Olight makes some of the lights discussed here. Olight specs and regular prices come from its product pages and user manuals as of September 2026; standard definitions come from the IEC, accredited test labs and flashlight makers' published guides.
⚡ TL;DR
The IPX8 meaning is simple once you split the code: the X says the product was not rated for dust, and the 8 says it resists continuous immersion under conditions the maker sets, which must be harsher than IPX7's 1 meter for 30 minutes. IPX8 covers still-water submersion. It does not cover water jets, dust, hot water or diving.
This table sums up the IPX8 meaning in six short answers.
| Question | Short answer |
|---|---|
| What does the X mean? | No dust rating was claimed; it does not mean "zero protection" |
| What does the 8 mean? | Protection against continuous immersion, beyond IPX7's 1 m for 30 minutes |
| How deep and how long? | Whatever the maker states; ANSI/PLATO FL1 fixed the soak at 4 hours before its 2025 edition, which lets depth and time vary |
| Does IPX8 include IPX6 jets? | No. Immersion and jets are different tests |
| Is IPX8 better than IP67? | For deeper or longer immersion, yes; for dust, no, because IP67 is dust-tight |
| What should you check? | The stated depth and time, the first digit, and the charging port design |
The pain point behind this search is usually a light that died after a rainy shift, or a buyer who read "IPX8" and assumed it meant "use it anywhere wet." Both come from reading the code as one number. The sections below take it apart, show what the test leaves out, and give you a checklist for the day your light goes in the lake.
📋 Table of Contents
- 1. What Does IPX8 Mean? The Quick Answer
- 2. IP Rating Explained: What Each Digit Means
- 3. What Does the IPX8 Test Actually Involve?
- 4. Is IPX8 Truly Waterproof?
- 5. Which Is Better, IPX6 or IPX8?
- 6. Which Is Better, IPX8 or IP67?
- 7. IPX8 Meaning in the Real World: Pressure, Temperature, Salt and Solvents
- 8. Why Does a Flashlight's Water Resistance Drop Over Time?
- 9. What Should You Do If Your Flashlight Falls in Water?
- 10. Waterproof Flashlight Rating by Environment: A Selection Table
- 11. FAQ
What Does IPX8 Mean? The Quick Answer
IPX8 means a product resists water during continuous immersion beyond what IPX7 requires, under depth and time conditions the manufacturer defines. The "IP" stands for ingress protection, the first character covers solids and dust, and the second covers water. An X in the first position means no dust claim was made, so an IPX8 flashlight tells you nothing about sand or grit.
The International Electrotechnical Commission created the code, and its overview of IP ratings says it exists to avoid "confusion over vague marketing terms like “waterproof.”" The IEC also notes that its page is informational and that the full test conditions sit in the IEC 60529 standard itself.
Two details shape everything that follows. First, IPX8 is the only water level with no fixed test. Second, the flashlight industry's own standard has shifted: earlier editions of ANSI/PLATO FL1 fixed the IPX8 soak at 4 hours at the depth the maker names, and the 2025 edition lets both depth and duration vary. If a spec sheet says only "IPX8," you know the light passed immersion beyond IPX7, but you do not know how far beyond.
This is also why Olight's product pages for the Warrior X 4, Baton 4 and Seeker 4 Pro list "IPX8" as a single line in the specs: the rating is real, but the depth figure is not printed there. Read it as "rated for immersion," then apply the margins in the sections below. Browse Olight's flashlights and other products and you will also see IPX4, IPX6, IPX7, IP67 and IP68 on the spec sheets, and each one describes a different kind of exposure.
IP Rating Explained: What Each Digit Means
An IP rating has two digits that are graded separately: the first runs from 0 to 6 for solids and dust, and the second runs from 0 to 9 for water. A higher first digit does not raise the second, and a higher second digit is not always a harsher version of a lower one. Read each digit as the name of one specific test.
In the IEC's words, "The first numeral refers to the protection against solid objects and is rated on a scale from 0 (no protection) to 6 (no ingress of dust)." And "The second numeral rates the enclosure’s protection against liquids and uses a scale from 0 (no protection) to 9 (high-pressure hot water from different angles)."
This table summarizes both digits, using the test descriptions published by the accredited lab Castle Compliance in its IEC 60529 guide.
| Digit | Level | What it means | Test in brief |
|---|---|---|---|
| First | 5 | Dust protected | Dust chamber with talcum powder, with or without under-pressure |
| First | 6 | Dust tight | Dust chamber with talcum powder, with under-pressure |
| First | X | Not rated | No dust claim was made |
| Second | 4 | Splashing | Spray from all directions, 10 minutes by oscillating tube or 5 minutes minimum by shower nozzle |
| Second | 5 | Water jets | 6.3 mm stream at 12.5 L/min, 3 minutes minimum |
| Second | 6 | Powerful water jets | 12.5 mm stream at 100 L/min, 3 minutes minimum |
| Second | 7 | Temporary immersion | 30 minutes with the lowest point 1 m underwater (tall enclosures: top 0.15 m underwater) |
| Second | 8 | Continuous immersion | Depth and duration beyond IPX7, set by agreement |
| Second | 9 | High-temperature, high-pressure jets | 80°C water sprayed at high pressure |
A flashlight labeled IP68 has passed both a dust-tight test and an immersion test. A light labeled IPX8 has passed only the immersion test. That single character is the difference between a headlamp you can trust in a sandblasting bay and one you should keep in a pouch there.
What Does the IPX8 Test Actually Involve?
The IPX8 test is a custom immersion test: the product sits underwater at a depth, for a time and at a water temperature the maker chooses, as long as the test is harsher than IPX7. The flashlight standard ANSI/PLATO FL1 used a fixed 4-hour soak until its 2025 edition, which now lets depth and duration vary. The water is still, and the light is not moving or being switched.
The accredited lab Keystone Compliance quotes the IEC 60529 clause in its IPX8 testing guide: "Unless there is a relevant product standard, the test conditions are subject to agreement between manufacturer and user, but they shall be more severe than those prescribed in IPX7 and they shall take into account the condition that the enclosure will be continuously immersed in actual use." Keystone adds, "Since this is a custom test, the liquid can be conditioned at a different temperature."
Castle Compliance puts the gap plainly: "IPX7 is a defined standard: 1 meter depth for 30 minutes. IPX8 is an agreed-upon standard that must be more severe than IPX7." It gives an example of what some makers pick: "Sometimes manufacturers use 1.1 meter for 1 hour for marketing purposes."
Flashlights add a second layer. Streamlight's ANSI/PLATO FL1 summary lists three water tests: temporary immersion, continuous immersion and splashing water. Nitecore's guide to the FL1 standard defines them as "IPX4 – water-resistant, or water splashed from all directions," "IPX7 – water-proof, or temporary submersion at 1 meter for 30 minutes" and "IPX8 – submersible, or continuous submersion at some specified depth for 4 hours."
That 4-hour rule belongs to the older editions. The Portable Lights American Trade Organization (PLATO), which develops the standard, says in its summary of the FL 1-2025 changes: "Previous editions specified a fixed four-hour testing duration. The revised standard allows testing depth and duration to vary, aligning the approach more closely with ANSI/IEC 60529." For the other numbers on an FL1 spec sheet, see this guide to the ANSI FL1 standard.
This table sets the two standards side by side so you can see which conditions are fixed and which the maker chooses.
| Condition | IEC 60529 IPX7 | IEC 60529 IPX8 | FL1 IPX8 (2009 and 2019 editions) | FL1 IPX8 (2025 edition) |
|---|---|---|---|---|
| Depth | 1 m (lowest point) | Set by agreement, harsher than IPX7 | "Some specified depth" stated by the maker | Can vary |
| Duration | 30 minutes | Set by agreement | 4 hours | Can vary |
| Water movement | Still | Set by agreement | Not specified in the public summaries | Not specified in PLATO's summary |
| Water temperature | Within 5 K of the product | Can be conditioned | Not specified in the public summaries | Not specified in PLATO's summary |
| What you learn from the label | Depth and time are known | Only that it beats IPX7 | Time is known; depth only if printed | Only what the maker prints |
Here is what that means in plain numbers. A light rated IPX8 under the 2009 or 2019 FL1 editions survived at least 8 times the soak time of IPX7 (4 hours versus 30 minutes, or 240 ÷ 30 = 8). The depth could be 1.1 m or 10 m. The Perun 3, Baton 4 and Seeker 4 Pro user manuals say their data were tested per ANSI/PLATO FL 1-2019 in Olight's labs, and the Warrior X 4 manual cites ANSI/NEMA FL 1-2009, so you can read their IPX8 and IP68 lines with the 4-hour definition of those editions in mind. A light tested under the 2025 edition may list a different time, so read the one printed.
Is IPX8 Truly Waterproof?
IPX8 is not "waterproof" in the everyday sense of "any water, any time." It means the product kept out harmful water during one kind of test: still-water immersion at a stated depth and time. It says nothing about jets, hot water, salt, soap or seal wear, and the protection can shrink as the product ages. Treat it as a strong immersion rating with limits.
Apple makes the same point for its own IP68 phones. Its water resistance page says, "Splash, water, and dust resistance are not permanent conditions and resistance might decrease as a result of normal wear." The same page shows how wide IP68 depths run within one brand: 6 meters for up to 30 minutes on newer iPhones, and 2 meters for up to 30 minutes on the iPhone 11. Both are the same two characters on the box.
Apple also tells owners to avoid "Exposing your iPhone to pressurized water or high velocity water, such as when showering, water skiing, wake boarding, surfing, jet skiing, and so on." That caution comes from a company whose products carry the highest immersion digit, and it lines up with the lab guidance below: immersion ratings and jet ratings are separate claims.
This table lists six common misreadings of the rating, with the fact and the source behind each.
| Misconception | Fact | Basis |
|---|---|---|
| IPX8 means waterproof at any depth | The depth is whatever the maker states, and it must only exceed IPX7 | IEC 60529 clause quoted by Keystone Compliance |
| IPX8 includes every lower water rating | Immersion does not cover jets; IP67 does not automatically cover IP66 | Castle Compliance |
| The X means the light has no protection from dust | The X means no dust claim was made or rated | IEC digit definitions |
| An IPX8 rating lasts the life of the product | Seal resistance can decrease with normal wear | Apple support; Polymers journal study on O-ring aging |
| Water temperature doesn't matter | Lab water must be within 5 K of the product because colder water creates a vacuum | Castle Compliance |
| Salt water behaves like tap water | Salt stays behind when water dries; an IPX8 test includes salt only if the custom test adds it | NOAA; Keystone Compliance |
Which Is Better, IPX6 or IPX8?
Neither IPX6 nor IPX8 is better across the board, because they are different tests. IPX6 covers powerful water jets for at least 3 minutes; IPX8 covers still-water immersion beyond IPX7. For hose-downs, boat spray or storm-driven rain, IPX6 is the relevant rating. For drops into a lake or a flooded ditch, IPX8 is. A light that needs both should list both.
Castle Compliance states the rule directly: "Did you know that IP67 does not automatically cover IP66? IEC 60529 explicitly states that immersion (IPX7 / IPX8) and water jets (IPX5 / IPX6) are different types of ingress tests." It adds that products needing both kinds of protection carry a dual rating such as IP66/IP67.
The pressure numbers show why a jet can beat an immersion rating. Keystone's water jet guide lists IPX5 at "12.5 liters per minute and pressure of 30 kN/m² at distance of three meters" and IPX6 at "100 liters per minute and pressure of 100 kN/m² at distance of three meters." You can convert those to an equivalent water depth with the hydrostatic formula, pressure = density × gravity × depth. For fresh water (an assumed 1,000 kg/m³ and 9.81 m/s²), each meter of depth adds about 9.81 kPa. NOAA's ocean pressure explainer gives the familiar version: "For every 33 feet (10.06 meters) you go down, the pressure increases by one atmosphere."
This table converts common exposures into equivalent fresh-water depth, using the formula above; the jet values come from Keystone's IEC 60529 descriptions.
| Exposure | Pressure | Equivalent depth (fresh water) | Calculation |
|---|---|---|---|
| IPX7 immersion at 1 m | 9.8 kPa | 1 m | 1,000 × 9.81 × 1 |
| Still water at 2 m | 19.6 kPa | 2 m | 1,000 × 9.81 × 2 |
| IPX5 jet | 30 kPa | about 3.1 m | 30 ÷ 9.81 |
| IPX6 jet | 100 kPa | about 10.2 m | 100 ÷ 9.81 |
| Still water at 10 m | 98.1 kPa | 10 m | 1,000 × 9.81 × 10 |
By that figure, an IPX6 jet presses on a seam about as hard as 10 meters of still water, though only for minutes and only on the side the jet hits. A light rated IPX8 to 2 meters has never been checked against that. Keep this in mind for truck washes, deck hoses and pressure washers, which Olight's product pages for the four lights below do not list as uses.
Which Is Better, IPX8 or IP67?
IP67 is the better rating when dust, sand or grit matter, because its 6 means dust tight and IPX8 makes no dust claim. IPX8 is the better rating when the light may stay underwater longer or deeper than 1 meter for 30 minutes. If you need both, look for IP68, which combines dust-tight protection with an immersion rating beyond IPX7.
The choice depends on what actually attacks your light. On a job site, the threat is often fine dust that rides into the threads and then wears the O-ring as you open the tail cap. Around docks and kayaks, the threat is a drop into water that is deeper than your arm can reach.
The Olight Perun 3 is the one light among the four here with a dust digit: Olight lists it as IP68. The Warrior X 4, Baton 4 and Seeker 4 Pro are listed as IPX8, which rates immersion only. That doesn't mean dust will get in; it means dust resistance was not part of the published rating.
IPX8 Meaning in the Real World: Pressure, Temperature, Salt and Solvents
The IPX8 meaning stops at the lab door: still water, a fixed depth, water close to the product's temperature. Real water adds motion, sudden cooling, dissolved salt and chemicals such as sunscreen or fuel. Each one can push a seal harder than the rating did, so a light can fail in conditions that look milder than its test.
Castle Compliance explains the temperature rule in its lab notes: "The water temperature for immersion and spray tests must be within 5K than the temperature of the product." The reason: "Some labs test with too cold of water, especially during the winter. This creates a vacuum within the enclosure that sucks water past the seals." Outdoors, nobody keeps that 5 K gap for you.
How much suction does a warm light get in cold water?
You can estimate it with the ideal gas law, pV = nRT, which NASA's equation of state page explains; NASA notes that the temperature "must be an absolute temperature that begins at absolute zero." If a sealed light's air volume stays fixed, the inside pressure falls in proportion to absolute temperature: p2 = p1 × T2 ÷ T1. The pressure gap across the seals is then p1 − p2. The upper temperature comes from Olight's user manuals for all four lights below, which list a working temperature of 0-40°C.
This table works through four cases, starting from sea-level air pressure of 101.3 kPa and ignoring water vapor.
| Light temperature | Water temperature | Pressure ratio (T2 ÷ T1) | Suction across seals | Equivalent extra depth |
|---|---|---|---|---|
| 40°C (313.15 K) | 10°C (283.15 K) | 0.904 | 9.7 kPa | about 1.0 m |
| 35°C (308.15 K) | 20°C (293.15 K) | 0.951 | 4.9 kPa | about 0.5 m |
| 30°C (303.15 K) | 15°C (288.15 K) | 0.951 | 5.0 kPa | about 0.5 m |
| 25°C (298.15 K) | 20°C (293.15 K) | 0.983 | 1.7 kPa | about 0.2 m |
The first row is the realistic worst case for a flashlight: a light that has been running on high, warm to the touch, dropped into a cold river. The suction alone equals about 1 m of extra water pressure, on top of the real depth. A light at 1 m in that river behaves roughly as if it were at 2 m. The last row shows why labs cap the gap at 5 K: the effect falls to about 0.2 m.
How much pressure does a splash or a drop add?
Moving water adds dynamic pressure, which NASA's dynamic pressure page gives as ρu²/2 for incompressible flow, where ρ is density and u is speed. For a light hitting water after a fall of height h, the entry speed is √(2gh), so the dynamic pressure works out to ρgh: a drop from a given height produces a brief peak roughly equal to that much water depth, before air drag and splash are counted.
This table applies the formula to everyday moments with fresh water at 1,000 kg/m³.
| Situation | Speed | Dynamic pressure | Equivalent depth |
|---|---|---|---|
| Waving a light slowly underwater | 1 m/s | 0.5 kPa | about 0.05 m |
| Swinging it fast underwater | 3 m/s | 4.5 kPa | about 0.46 m |
| Dropped from a 1 m dock | about 4.4 m/s at entry | 9.8 kPa | about 1 m |
| Dropped from a 3 m deck | about 7.7 m/s at entry | 29.4 kPa | about 3 m |
These peaks last a fraction of a second and hit one side of the light, so they are not the same as sitting at that depth. They still explain why a light rated for a modest depth can take in water from a high drop even though it later sinks only a meter.
Salt, chlorine and solvents
Salt water leaves something behind. NOAA's page on why the ocean is salty says "about 3.5 percent of the weight of seawater comes from the dissolved salts." That means every 10 grams of seawater left on a light (about 10 mL) dries into roughly 350 milligrams of salt (10 × 0.035 = 0.35 g), which settles in threads, switch gaps and charging contacts. IPX8 does not require a salt-water test; Keystone notes only that a custom IPX8 test can include "something in the liquid such as a chemical or substance like salt."
Apple also tells owners to minimize contact with soap, detergent, acids, perfume, insect repellent, lotions, sunscreen, oil, adhesive remover and solvents, which are the same substances a light meets on a fishing boat or a job site.
Why Does a Flashlight's Water Resistance Drop Over Time?
A flashlight's water resistance drops because its O-rings and gaskets are elastomers, and elastomers age. Heat, oxygen, time and repeated opening all change the rubber, and a flattened or hardened ring presses less firmly on the metal. A light that passed IPX8 when it was new can leak years later, even though the rating on the page never changed.
A 2019 study in the journal Polymers on O-ring seal failure puts it in general terms: "like all polymers, elastomers age under the influence of e.g., oxygen, heat, time, UV radiation, and dynamic loads." The authors also warn that a weakened seal "might be slightly disturbed by temperature changes (especially cooling, leading to thermal shrinkage), pressure changes, or vibrations." That describes a cold-water drop almost exactly: cooling, a pressure change and a jolt.
Olight's existing guide to O-ring care covers cleaning, lubricating and replacing rings step by step. Use the checklist below as a quick inspection between those full services.
This checklist turns seal aging into things you can see or feel in two minutes.
| Check | What a healthy seal looks like | Warning sign | What to do |
|---|---|---|---|
| Ring shape | Round cross-section that springs back | Flat spot or oval profile | Replace the ring |
| Ring surface | Smooth and slightly glossy | Cracks, chalky look, nicks | Replace the ring |
| Threads and seat | Clean metal | Sand, grit or salt crust | Clean before closing |
| Tail cap feel | Smooth, even resistance | Gritty or suddenly loose | Open, clean and inspect |
| Port cover or charging contacts | Cover seats fully; contacts bright | Cover gaps; green or white residue | Dry and clean; keep the cover closed near water |
| Inside the lens | Clear | Fog or droplets | Treat as water ingress (see next section) |
A useful schedule: inspect after every salt-water or muddy outing, and at least twice a year for a light that sits in a kit. A light that lives in a vehicle sees more heat cycles than one in a drawer.
What Should You Do If Your Flashlight Falls in Water?
Get it out, switch it off, rinse off anything that isn't clean fresh water, and dry the outside before you open it. Don't charge it until it is completely dry, and don't speed things up with heat. If water got inside, remove the battery and let the parts dry at room temperature, then watch the battery for warning signs.
Apple's guidance for wet phones maps well to a sealed flashlight: "If a liquid other than water splashes on your iPhone, rinse the affected area with tap water," make sure it is dry before opening it, and "Don't dry your iPhone using an external heat source." On charging, Apple says to wait until the device is completely dry and to "Allow at least 5 hours before charging."
Follow these steps in order.
- Retrieve the light and switch it off or lock it out, so a short can't keep drawing current.
- If it was salt water, pool water or dirty water, rinse the outside with fresh tap water while it is still closed.
- Wipe it dry, paying attention to the tail cap seam, the switch and any charging contacts or port cover.
- With the outside dry, open the tail cap and look for droplets, fog or residue.
- If the inside is dry, wipe the threads, check the O-ring and close it.
- If water got in, remove the battery, leave the body open in a dry, ventilated room, and keep it away from heaters and hair dryers.
- Wait at least 5 hours, and until everything is visibly dry, before you charge it.
- Inspect the battery before reuse.
Safety note: the U.S. Fire Administration says to "Stop using lithium-ion batteries if you notice an odor, change in color, too much heat, change in shape, leaking or odd noises." It also advises that you not charge them below 32°F (0°C) or above 105°F (40°C). See the full list on its battery fire safety page.
Tip: if the lens fogs a day after a dunk, water got in even though the light still works. Dry it fully now, because salt and moisture corrode contacts slowly, and the failure often shows up weeks later.
Waterproof Flashlight Rating by Environment: A Selection Table
Choose a waterproof flashlight rating by the harshest water you expect, not the most common. Rain and splashes need IPX4; hose spray and wave spray need IPX6; drops into water need IPX7 or IPX8; dust plus water needs IP67 or IP68; diving needs a light rated for a stated depth in meters. Then add a margin for heat, motion and age.
This table matches common environments with the minimum rating to look for and the reason.
| Environment | Minimum rating to look for | Why | Extra margin |
|---|---|---|---|
| Dog walks and rain | IPX4 | Splashing water from all directions | IPX6 if you stay out in heavy storms |
| Car wash bay or deck hose | IPX6 | Jet pressure equal to about 10 m of water | Keep port covers closed |
| Kayak, dock or bank fishing | IPX8 | A drop may sink out of reach | A lanyard or float; check the stated depth |
| Construction site with dust and rain | IP67 or IP68 | Dust in threads and seams wears seals | Clean threads before opening |
| Flood cleanup or storm damage | IP68 or IPX8 | Standing water plus debris | Rinse after use; inspect seals |
| Scuba or deep snorkeling | A dive light rated in meters | IPX8 alone doesn't state depth | Pick a stated depth well past your dive |
Hurricane kits add a storage problem on top of the water problem. If your lights sit in a humid garage all season, see the notes on hurricane supplies storage for keeping them ready.
Olight lights by environment
Each of the four Olight lights below carries an immersion rating. The differences are in dust protection, charging design and how you carry them, which decide where each one fits best. None of the four lists diving among its uses on Olight's product pages, so none is a dive light.
This table uses Olight's official specs and regular prices as of September 2026.
| Light | Water and dust rating | Charging | Max output and beam | Weight | Regular price |
|---|---|---|---|---|---|
| Olight Perun 3 | IP68 | MCC3 magnetic charging cable | 3,000 lumens, 160 m, 6,400 cd | 150 g | $89.99 |
| Olight Warrior X 4 | IPX8 | USB-C or MCC3; port behind a dust cover | 2,600 lumens, 630 m, 99,310 cd | 249 g | $129.99 |
| Olight Baton 4 | IPX8 | MCC 1A magnetic cable (Premium case uses USB-C) | 1,300 lumens, 170 m, 7,225 cd | 52.5 g | $54.99 |
| Olight Seeker 4 Pro | IPX8 | USB-C with holster, or MCC3 | 4,600 lumens, 260 m, 16,895 cd | 205 g (Silver-Plated Bronze: 350 g) | $139.99 |
Dust plus water on a job site: Olight Perun 3. The problem on a site is grit and rain together. The Olight Perun 3 headlamp is the only light here rated IP68, so it has a dust-tight rating as well as immersion, and it charges through a magnetic MCC3 cable. Olight lists Turbo at 3,000~800~600 lumens for 2 + 180 + 30 minutes, High at 600~120 lumens for 300 + 30 minutes, Med at 120 lumens for 25 hours, Low at 30 lumens for 89 hours, Moon at 5 lumens for 20 days, and red light at 60 lumens for 14 hours or 15 lumens for 70 hours. The limit: Olight notes that the headlamp's metal mounting bracket is expected to scratch the body if you take the light in and out repeatedly. For a lighter pocket option, the Baton 4 below is less than half the weight.
Pocket carry near water: Olight Baton 4. A small light near a dock or a kayak is the one most likely to go overboard. The Olight Baton 4 EDC flashlight weighs 52.5 g, is rated IPX8 and charges by MCC 1A magnetic cable. Olight lists Turbo at 1,300~600~300 lumens for 1.5 + 2.5 + 73 minutes, High at 600~300~60 lumens for 7 + 72 + 16 minutes, Med at 60 lumens for 8 hours, Low at 12 lumens for 35 hours and Moon at 0.5 lumens for 30 days. The limit: the Premium edition's charging case has a USB-C port, and the specs don't say the IPX8 rating covers the case, so keep the case in a dry bag.
Patrol and search in heavy weather: Olight Warrior X 4. Rain on a long shift is the norm for patrol and search teams. The Olight Warrior X 4 tactical flashlight is rated IPX8 and hides its battery indicator and USB-C port behind a dust cover that you rotate a quarter turn to open. Olight lists regular-mode High at 2,600~1,000~300 lumens for 3 + 140 + 20 minutes, regular-mode Low at 300 lumens for 8 hours, and tactical-mode Med at 1,000~300 lumens for 150 + 20 minutes. The limit: the port is only protected when the cover is closed, so turn it shut before you head out. At 249 g, it is also heavier than the standard 205 g Seeker 4 Pro.
Home emergencies and maintenance: Olight Seeker 4 Pro. A utility light gets handled with wet hands and set down on wet porch steps and garage floors. The Olight Seeker 4 Pro flashlight is rated IPX8, and Olight says its 1,200 laser micro-pierced holes form hidden indicators "while still keeping IPX8 waterproof." Olight lists Turbo at 4600~1200~600 lumens for 2.5 + 122 + 35 minutes, High at 1200~600~300 lumens for 135 + 35 + 10 minutes, Med at 300 lumens for 11 hours, Low at 50 lumens for 60 hours and Moon at 5 lumens for 15 days. The limit: USB-C charging runs through the holster, so charge it indoors and dry. For dusty job sites, the IP68 Perun 3 is the better match.
Note: all four user manuals list a working temperature of 0-40°C. Hot tubs, steam rooms and dishwashers fall outside that range, and a light that is hot from use and then dropped into cold water faces the suction effect shown earlier.
For rankings across more use cases, see the best flashlights comparison. If reach matters as much as water resistance, this guide to beam distance explains how candela sets it.
Your IPX8 action list
- Read the IPX8 meaning as "immersion only, conditions set by the maker," and look for a stated depth and time.
- Check the first digit: X means no dust rating, 6 means dust tight.
- Add IPX6 to your list if the light will face hoses, spray or pressure washers.
- Keep port covers closed and charging contacts dry near water.
- Let a hot light cool before you work in cold water when you can.
- Rinse off salt, chlorine and chemicals with fresh water after each exposure.
- Inspect O-rings at least twice a year and after every salt-water trip.
FAQ
Changelog
- September 23, 2026: First published.
