Industrial Lighting

Anti Corrosive Light Fittings: A Buying Guide for Food Factories, Kitchens and Wet Areas

29 July 2026 · 10 min read

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If you are sourcing lights for a food factory, a commercial kitchen, a car park or a damp warehouse, you have already met the term anti corrosive fitting, or triproof. Whoever is asking, a consultant, the owner, the main contractor or purchasing, the brief usually arrives as a list of conditions: IP65, corrosion resistant, washable, hygiene compliant. Each of those maps to a specific product decision. This guide covers what actually comes up when you buy one: the protection rating, the diffuser, what a hygiene inspection is looking at, and how to tell whether the quote in front of you is the right product.

What is an anti corrosive fitting?

An anti corrosive fitting, often called a triproof light, is a batten built to resist water, dust and corrosion. It is not an official product category in any standard. On site it means a sealed LED tube batten, and it turns up in places like these:

• Food processing plants (meat handling, vegetable washing, packing halls)
• Commercial and central kitchens
• Damp car parks and basements
• Warehouses and logistics centres
• Chemical plants and pharmaceutical clean areas

How to read an IP rating

An anti corrosive fitting needs IP65 as a minimum. The IP code comes from IEC 60529. The first digit is protection against solids and dust (0 to 6), the second is protection against water (0 to 9).

The gap between IP65 and IP66 is water pressure, not dust. Both are already dust tight. Under IEC 60529 the IP65 test uses roughly 12.5 litres per minute at 30 kPa from 3 metres away. IP66 raises that to roughly 100 litres per minute at 100 kPa. That is the real difference: ordinary hosing down versus a pressure washer aimed at the fitting.

So for most food factories and kitchens, IP65 is enough. IP66 earns its keep in washdown zones that get blasted daily. A spec sheet will sometimes just say IP66, so it is worth asking how that area is actually cleaned before paying the difference.

The one food factories miss: clear diffuser or frosted?

Start with the documented part. The Codex Alimentarius General Principles of Food Hygiene require adequate lighting in food handling areas, and require light fittings to be protected so that breakage cannot contaminate food. In Malaysia the Ministry of Health inspects against the Food Hygiene Regulations 2009, and MeSTI certification sits in the same framework. So the requirement for sealed, protected, cleanable fittings is grounded in the rules.

The next part is our own experience from food factory jobs rather than anything written in a regulation, but it is worth knowing.

An inspector walks in and looks up. If the diffuser is frosted, they cannot see inside the fitting. Dead insects, dust build up, mould? No way to tell without opening it, and they are not going to open it for you. The result is an item that cannot be verified on the spot, which is the kind of thing that gets written down.

A clear diffuser is easier to live with. The inspector can stand on the floor, look up, and see the inside of the fitting without touching anything. There is nothing wrong with the product. This is simply the choice that suits how inspections actually run here.

At home and in offices a frosted diffuser softens glare and looks more comfortable. A production floor is a different problem. Staff are not worrying about glare, and the inspector is worrying about what they can see inside the fitting.

The other specs: length, wattage, colour temperature, materials

• Length: 2ft (0.6m) and 4ft (1.2m). Food factories mostly use 4ft.
• Wattage: 18W, 22W and 36W are common in 4ft; 12W, 15W and 24W in 2ft or specific models. Pick from ceiling height and the light level you need, not from whichever is brightest.
• Colour temperature: 6500K daylight for food processing areas, since you need to judge the colour of the product and whether a surface is clean. 4000K is fine for warehouses and walkways. More on this in our colour temperature guide.
• Diffuser material: polycarbonate (PC) beats ordinary acrylic (PMMA). PC takes an impact, yellows more slowly, and holds up better against the chemical cleaners a food plant uses.
• Body material: an aluminium base sheds heat better. Plastic is cheaper but can distort over years of running hot.

SIRIM certification, what to hand over and how it gets checked

When a project goes for approval, SIRIM certification is usually the first document requested.

T8 LED tubes are certified by SIRIM QAS International. Whoever is approving takes the licence number from the certificate and checks it against the Malaysian Certified directory to confirm it is genuine and still valid. You do not need to hand over the whole certificate. The first page, with the licence number, the holder, the standard and the validity period, is normally enough.

Certified tubes also carry a SIRIM hologram label with a QR code on it. Scanning it goes straight to the verification page, so anyone can confirm it on site with a phone. That is more convincing than any PDF.

“No SIRIM, no approval.” What then?

This is where most people get stuck. The person asking might be a consultant, the owner, the main contractor or purchasing. Either way they want a certificate, and the anti corrosive housing in your hand does not have one of its own. Once the structure is clear, this is not a hard step to get past.

A split type anti corrosive light is a housing plus a tube. The housing is an empty shell. Its job is to hold the tube, seal it and protect it, which puts it closer to a lampholder than to a live component. The part that takes current, lights up and contains electronics is the tube, so that is what the certification follows. Certification generally applies to the live parts, and an empty structural part usually falls outside it.

So what you supply is the tube's SIRIM certificate, verified by licence number or by scanning the hologram on site.

If they still insist on one certificate covering the complete fitting, the answer is an integrated luminaire, with the LED built into the body and no replaceable tube. That can be done, but two things are worth thinking about first.

• The price is not comparable. Integrated units are mostly international brand product lines and sit in a different bracket.
• Failures cost more. The advantage of the split type is maintenance. When a tube fails you buy a tube and swap it in minutes. When an integrated unit fails you usually replace the whole thing, which means lead time and a full reinstall. In a food plant or kitchen that cannot easily stop work, that downtime costs more than the light did.

That is why most food factory and kitchen jobs end up with the split type. The purchase price is the smaller half of the decision. What counts is what it costs you to keep running over the next few years.

How to tell whether a quote is sound

1. Ask what the diffuser is made of. Polycarbonate or ordinary acrylic? PC takes impact and cleaning chemicals, and in a food plant it is worth the difference. Acrylic is cheaper but yellows and turns brittle after enough washing.
2. Ask for the IP rating, not just “it is waterproof”. IP65 is the floor. If someone quotes IP65 at a price well below everyone else, ask for the test report or the standard referenced on the certificate.
3. Buy one sample first. Do not order fifty. Open one up and look at the gasket, the thickness of the diffuser, and whether the clips seal properly. None of that shows in a photo. One sample can save you the trouble of returning fifty.
4. Count the freight. A 4ft tube ships in a box about 130cm long and couriers charge on volumetric weight, so delivery often costs more than expected. Bulk is negotiable, single samples less so.

Where else these fittings are used

• Commercial and central kitchens: grease, steam and regular washing. IP65 with a clear diffuser.
• Indoor car parks: damp, with mild corrosion from exhaust. IP65, 4000K or 6500K both work.
• Pool plant and pump rooms: high humidity and chlorine. IP66 or better, with stainless steel body and fixings.
• Covered walkways and loading bays: wind, rain and dust. IP65 is enough, but check the fitting drains once installed so water cannot pool in it.
• Chillers and freezers: the driver has to tolerate sub zero temperatures. A standard fitting may not, so look for one rated for cold storage.

Buying checklist

If you have a live project, come and see the samples and the certification at our Kepong shop. We keep 2ft to 4ft and 12W to 36W in stock, and we have done food factory jobs before, so we can help you get through the approval step.

Tags: anti corrosive light · triproof · food factory lighting · IP65 · hygiene compliance · industrial lighting · SIRIM · project approval · LED tube