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Eight series: tube, batten, sealed and explosion-proof

The range splits by housing rather than by wattage. TP-F1 is a single-tube fitting from 10W to 30W in 600, 1200 and 1500 mm, at 100 lm/W — the direct replacement for a single fluorescent batten in a car park or a cold store. TP-F2 is the twin-tube version from 20W to 60W, which is what a 2 x 36W fluorescent fitting becomes.

TP-M runs at 105 lm/W in 20W, 40W and 60W and is the general-purpose sealed batten. TP-T1 and TP-T2 are the car park ranges: shorter bodies with a narrower light distribution for low ceilings and underground levels. TP-EN2 is the heavy-duty aluminium range from 20W to 100W with a die-cast end cap and an IP66 IK10 rating. TP-EX is explosion-proof for hazardous areas, and TP-T80 is the IP69K version for high-pressure, high-temperature wash-down.

Output and efficacy are the published figures for the standard tube ranges. EN2, EX and T80 are configured per order, so power and output are quoted against the drawing rather than taken from a fixed table.

Replacing fluorescent battens one for one

Most tri-proof installations are relamping a fluorescent batten, and the fitting dimensions match so the existing brackets can be reused. A 1 x 36W fluorescent batten draws about 45W with the ballast and delivers roughly 3,000 lm; the 18W TP-F1 delivers 1,900 lm and the 25W delivers 2,500 lm, so the match is a 25W or 30W unit where the old fitting was a single 36W tube.

Where the old fitting is a 2 x 36W twin, the 40W TP-F2 is the one-for-one replacement: same body length, same fixing centres, 4,000 lm against the 6,000 lm of the old twin, which is why a 50W or 60W unit is often chosen to keep the same light level.

System lumens for fluorescent include ballast losses and a 20% depreciation allowance.

IP65, IP66, IP69K or explosion-proof: picking the right one

This is the specification that decides whether the fixture lasts, and it is not a marketing choice. IP65 covers dust and water jets and is the correct grade for a covered car park or a warehouse. IP66 adds protection against powerful water jets, which is the grade for a food plant that hoses down equipment. IP69K adds high-pressure, high-temperature wash-down and is used in dairies, breweries and meat processing.

Explosion-proof is a different certification, not a stronger IP rating. Around solvent vapour, flour dust or fuel, the enclosure has to contain an internal spark and limit the surface temperature, which is what the TP-EX range does with a 2.5KV surge rating and a 0.95 power factor. Do not substitute an IP69K fitting for an Ex-rated one, whatever the datasheet says about sealing.

Sealing depends on the cable gland as much as on the body — a correct IP66 fixture with an untightened gland leaks. State the cleaning regime on the enquiry and we match the gland and the gasket.

Installation, linking and controls

All tube ranges are surface-mounted on the existing bracket with stainless clips, which is what makes them a drop-in replacement for a fluorescent batten. The sealed ranges (EN2, EX, T80) use die-cast end caps and cable glands, so the cable entry has to be specified at the order stage.

For long runs, through-wiring from fixture to fixture reduces the number of drops from the ceiling; the terminal block accepts a loop in and loop out on the standard ranges. Emergency versions with an integral battery pack, and sensor versions with a microwave detector, are quoted per project because the battery and sensor change the housing depth.

Frequently asked questions

Related ranges: high bay lights for tall warehouses, panel lights for offices and clean areas, LED battens for dry indoor ceilings, wall packs for the building perimeter.