IP65, IP67, or IP69K? Most spec sheets will not tell you that the gap between them is the difference between a fixture that survives your washdown crew and one you are replacing years before you budgeted for it.
Two decisions cause most early failures in this category, and they are the same two every time: the IP rating gets chosen from a catalog instead of from the site, and nobody checks the IK rating at all.
This guide gives you the numbers behind every rating — 100 bar at 80°C for IP69K, 20 joules for IK10, −20°C to +50°C for cold storage gaskets — plus the four supplier checks that separate a real factory from a trading company with a good website.
Skip the reading — send us your site conditions and get a spec sheet back in 24 hours →
What a Tri-Proof Light Actually Is
A tri-proof light is a sealed tube built to be hosed down, dropped on, and breathed on by chemicals — and to still be lit in year ten.
The “tri” is water, dust and corrosion. Industrial-grade models add a fourth: impact.
The difference from a standard indoor LED tube is the architecture, not the LED. Tri-proof fixtures use heavy-duty polycarbonate or stainless steel housings, seated silicone gaskets and protective coatings that keep moisture, airborne dust and aggressive vapors away from the driver board. A standard fitting in the same room fails at the driver first, almost every time.
New to tri-proof lighting? Start with our introductory guide: What Are Tri-Proof Lights and Why Do You Need Them?
Knowing what a tri-proof light is only helps if you know where it belongs. Here are the four environments that account for most of what we ship — and what each one does to a fixture that was not built for it.
Where Tri-Proof Lights Go — and What Kills Them There
Before you look at a single specification, look at the room. Operating conditions decide the ingress rating, the housing material and the end cap alloy. Everything else follows.
Food Processing Facilities
Food plants wash down at the end of every shift: 80°C water at 100 bar, aimed upward at the ceiling, with a chlorinated or peracetic sanitizer in the mix.
A fixture that only claims IP65 fails here in a specific and predictable way. Water does not pour in — it gets driven past the gasket as vapor, condenses inside the tube, and settles on the driver board. The light keeps working for months. Then it does not.
Selection criteria: IP69K, tested to the 100 bar / 80°C protocol — ask for the report, not the badge. Housing and end caps must also stand up to your sanitizer, because different cleaning chemistries attack different polymer and steel grades. Send us the chemical name, not just “food-grade cleaner.”
Cold Storage Facilities
Cold stores fail fixtures through thermal shock, not cold. Temperatures sit below −20°C, then a door opens and warm humid air hits a freezing housing. Condensation forms on and inside the fixture within seconds.
Low-grade gaskets do not survive that cycle. They harden, shrink away from the seat, and the seal you paid for quietly stops being a seal.
Selection criteria: a rated operating range of −20°C to +50°C, and silicone gaskets that stay flexible at sub-zero. Ask the supplier what the gasket is made of. If the answer is “rubber,” keep looking.
Car Washes
Automated bays run continuous high-pressure spray with chemical detergents. Water pressure routinely exceeds 100 bar, which will push moisture straight past the seals of a standard moisture-resistant fitting.
Selection criteria: IP67 minimum, to handle direct high-pressure streams and brief submersion. If the bay also has manual lance cleaning aimed at the ceiling, specify IP69K instead.
Warehouses and Parking Garages
Here the enemy is physical, not liquid. Forklift masts and pallet corners strike fixtures, while airborne dust settles on lenses and quietly takes output away year after year.
For high-ceiling logistics halls, compare against LED high bay lights before you commit — above roughly 8 m, a high bay usually beats a linear tri-proof run on both cost and uniformity.
Selection criteria: an IK rating of IK08 or IK10, shatterproof lenses, dust-tight enclosure.
IP and IK Ratings: The Numbers Behind the Labels
Two specifications decide whether a fixture survives your site: IP and IK. They are not marketing labels. They are test protocols, and each one has a number you can hold a supplier to.
IP Rating: Water and Dust Protection
The IP (Ingress Protection) rating is two digits. The first covers solids, from a finger down to fine dust. The second covers liquids, from vertical drips up to high-pressure hot water jets.
| IP Rating | Dust Protection | Water Protection | Typical Applications |
| IP65 | Completely dust-tight | Protected against water jets from any direction | General damp environments, warehouses, parking lots |
| IP67 | Completely dust-tight | Submersible to 1 meter for 30 minutes | Car washes, outdoor installations |
| IP69K | Completely dust-tight | Resistant to 100 bar / 80°C close-range jets | Food processing plants, pharmaceutical plants |
For car washes, parking garages and tunnels, IP65 is usually the floor. Our U Series Tri-Proof Light is built for exactly that band.
Water and dust are only half the story. Impact resistance is the other half.
IK Rating: Mechanical Impact Resistance
The IK rating measures how much mechanical impact a luminaire absorbs without breaking or going dark. The scale runs IK00 to IK10.
IK10 means the fixture survives 20 joules — a 5 kg weight dropped from 40 cm onto the lens. That is roughly what a forklift mast does when the driver misjudges the aisle.
| IK Rating | Impact Energy | Typical Applications |
| IK08 | 5 joules | General industrial environments, warehouses |
| IK10 | 20 joules | Forklift aisles, parking structures, high-collision zones |
Spec IK08 for general warehouse aisles. Spec IK10 anywhere a forklift can physically reach the fixture.
How Do You Combine the Two?
| Your site | Spec this | Cost relative to baseline |
| Dry, no forklifts — storage mezzanine, dry corridor | IP65, no IK requirement | Baseline |
| Damp, forklift traffic — parking garage, loading dock | IP65 + IK08 | Small step up |
| Washdown, forklift traffic — food plant, car wash bay | IP69K + IK10 | Significant step up |
Where does the extra money actually go?
Into the gasket and the end caps. A washdown-rated fixture uses a molded silicone gasket and stainless end caps instead of a simpler seal and plastic caps. That is where most of the price gap sits — ask us to quote two grades side by side and you will see it broken out.
Do not over-spec. IP69K in a dry warehouse buys you nothing. We will quote it if you ask, but we would rather tell you now: that money is better spent on IK10 lenses in the forklift aisles.
Not sure which row you are in? Send a photo of the ceiling and one line about how the room gets cleaned. We will tell you which combination you need — and if it is the cheaper one, we will say so. Get my IP + IK recommendation →
Performance Specs That Set Your Operating Cost
Once you know the fixture survives the room, the next question is what it costs to run for the next ten years.
Luminous Efficacy (lm/W)
Efficacy is how much light you get per watt. Standard industrial tri-proof fixtures land between 110 and 130 lm/W. Every 10 lm/W you gain comes straight off the energy bill for the life of the installation.
How to read a datasheet honestly: some suppliers quote raw LED chip efficacy, which ignores driver losses and lens attenuation. Always ask for system efficacy — the number measured at the fixture with the driver in circuit — and ask for the test report that backs it. We will send ours for whichever model you are quoting.
Color Temperature
| CCT | Light Color | Suitable Scenarios |
| 4000K | Neutral White | Offices, general industrial environments |
| 5000K | Cool White | Factory workshops, high-concentration tasks |
| 6500K | Daylight White | Precision work, colour-critical inspection |
We build 2700K to 6500K, customized per project.
Dimensions
Standard tubular tri-proof fixtures come in three outer diameters: 45 mm, 70 mm and 80 mm. The choice is not cosmetic.
- 45 mm — tight installation zones, narrow brackets, strict overhead clearance.
- 70 mm and 80 mm — room for higher-wattage drivers, better thermal mass, wider optics.
- 70 mm and 80 mm also give greater mechanical rigidity, which matters in high-vibration bays.
We also build custom housing lengths to match an existing bracket layout, so a retrofit does not turn into a rewiring job. More on what we can change: 13 ways we tailor every light.
Materials
Housing and end cap materials decide lifespan and corrosion resistance more than anything else on the datasheet.
| Component | Material | Why it matters |
| Diffuser | PC (Polycarbonate) | Impact-resistant, high-temperature resistant, shatter-resistant |
| Lens | PMMA (Acrylic) | Higher transmittance and efficacy — but brittle. Not for impact zones. |
| End Cap | Stainless steel (304L / 316L) | Corrosion-resistant, for humid and chemical environments |
| End Cap | Plastic | Lower cost, dry environments only |
For damp and corrosive rooms, specify stainless end caps with an extruded aluminum housing and a PC cover. Where chloride-based sanitizers are in daily use, 316L is the safer of the two stainless grades — it resists chloride pitting better than 304L. If you are not sure which applies, send us the safety data sheet for your cleaning chemical and we will tell you.
When to Specify Dimmable, Emergency, or Sensor Controls
Most industrial fixtures still run on a wall switch. Three situations justify paying for more.
Dimmable Tri-Proof Lights
0-10V gives you simple analogue control. DALI gives you individual fixture addressing and group control from a building management system. Choose 0-10V for a single zone on a daylight sensor; choose DALI when the facility already runs a BMS or you need per-fixture reporting.
Specify it when: you are chasing an energy compliance target, running multi-purpose zones, or harvesting daylight near roof lights.
Emergency Backup Tri-Proof Lights
Integrated battery packs switch the fixture to battery the moment mains power drops, keeping egress routes lit and the building code satisfied.
Specify it when: the fixture sits on a fire escape route, a stairwell, a cold store aisle, or anywhere people need to walk out in the dark. On larger installations, compare integrated packs against a dedicated emergency circuit before you decide — above a certain fixture count the central circuit usually wins on cost.
Microwave Motion-Sensor Controls
Integrated microwave sensors detect movement across a wide zone and drop the fixture to standby or off when nobody is there. In low-traffic areas that cuts lighting energy by more than 50%.
Specify it when: underground parking, secondary warehouse aisles, corridors, cold rooms.
One warning: microwave sensors respond to movement through packaging and thin partitions, which is usually the point — but in a cold store it also means moving air and running evaporator fans can hold them awake. Narrow the detection zone, or use a cold-rated PIR instead. Tell us the room and we will spec the right one.
How to Vet a China Manufacturer: Four Checks
China supplies most of the world’s industrial LED tri-proof lights, and quality across suppliers varies more than any datasheet will admit. Four checks separate a factory from a trading company with a good website.
1. Compliance and Certification Packs
Verify certifications for your target region — CE and RoHS for Europe, UL or ETL for North America, RCM for Australia — and ask for the full report, not the badge in the footer.
How to tell a real certificate from a decorative one in 60 seconds:
- The certificate names a model number, not a product category. “LED Tri-Proof Light” on a CE certificate means nothing.
- The report carries a serial number you can look up on the test house’s own site. TÜV, SGS and Intertek all publish lookup pages.
- The issue date is recent and the standard cited is current — EN 60598 for luminaires, not a withdrawn edition.
Run that check on us first. Ask and we send the current test reports for the model you are quoting, in one email, no form to fill in.
2. Manufacturing Depth and Quality Assurance
Ask three questions a trading company cannot answer:
- “What is the aging test time on your line, and is it 100% or a sample?” A factory answers in hours and knows the sampling rule. A trader changes the subject.
- “Who makes your driver, and can I specify a different brand?” A factory names the brand and quotes the swap. A trader says “high quality driver.”
- “Send me a photo of your IP69K test rig.” It is a 100 bar rotating nozzle in a stainless cabinet. Very few people own one. Everyone claims the rating.
We build in our own Shenzhen plant with 17 years behind the line, and we will answer all three in writing before you place an order. What we stand behind afterwards is set out here: our 5-year warranty.
3. OEM / ODM Customization Support
Engineered projects rarely fit an off-the-shelf part. Confirm your supplier can deliver custom lengths, specific color rendering (CRI 80 / 90 / 95), integrated control modules and private labeling — and confirm it before the quote, not after.
4. Engineering Turnaround and Technical Support
On a live bid, the supplier who answers in 24 hours wins the drawing. Ours:
- 24 hours — custom DIALux photometric simulation
- 48 hours — 2D / 3D mechanical drawings
- 3 to 5 days — prototype sampling
How we hit those timelines: how fast you can get custom LED samples.
Tri-Proof Light FAQs
Is IP69K worth the extra cost if my plant only washes down once a week?
Usually not. IP69K is written for daily close-range 100 bar washdown. For weekly cleaning with a standard hose, IP67 with stainless end caps costs noticeably less and lasts just as long in that duty. Ask us to quote both and compare them side by side.
What actually limits the life of a tri-proof light?
The driver, not the LED, in almost every case. LEDs fade slowly and predictably; drivers fail when they run hot. In a warm loading dock or an enclosed ceiling void, ask for the driver’s rated case temperature and check it against your ambient before you compare lumen-maintenance figures.
Can I run tri-proof lights on an emergency circuit instead of built-in batteries?
Yes, and on larger installations it is usually cheaper. Integrated 3-hour battery packs win on smaller jobs because they avoid a separate circuit and a separate maintenance test regime. Send us the fixture count and we will work out which side of the line you are on.
Do microwave sensors work in cold storage?
They work, but they can be held awake by moving air and running evaporator fans, which defeats the energy saving. Narrow the detection zone, or use a PIR with a cold-rated lens instead.
What is the difference between a tri-proof light and an LED batten light?
Sealing. An LED batten light is an open or lightly covered strip for dry indoor use, typically IP20 to IP40. A tri-proof light is a fully gasketed tube starting at IP65.
Can I replace an old fluorescent tri-proof fitting without rewiring?
Often yes — LED tri-proof fixtures are built in the same 1200 mm and 1500 mm lengths as the fluorescent fittings they replace, and in many cases the existing brackets can be reused. Send a photo of the bracket and the spacing and we will confirm before you order.
Send Us the Site, Not the Part Number
You have just read 2,000 words on how to spec this yourself. You do not have to.
Send us three things — what happens in the room, how it gets cleaned, and how high the ceiling is — and we send back a spec sheet with the IP rating, the IK rating, the wattage and a DIALux layout. Not a catalog.
| DIALux photometric simulation | 24 hours |
| 2D / 3D mechanical drawings | 48 hours |
| Physical prototype | 3–5 days |
| Test reports for the model you are quoting | Same day, one email |
Send my site conditions — spec sheet back in 24 hours →
Free, and no account needed. If your project turns out to need IP65 instead of IP69K, we will tell you that too — it is a smaller order for us and a better building for you.
