E40 LED Filament Bulb 43W IP65 High-Bay - Cool White

This high-power E40 LED bulb, for the large fittings that took high-wattage discharge lamps, gives 9,000 lumens from 42.8W. Its cap is the Goliath Edison Screw. The bulb itself is a clear glass tube, 52mm across and 232mm long, with LED filaments inside, and it is rated to replace 477W. When you weigh it against the lamp coming out, compare lumens as well as watts: lumens measure the light a lamp gives, watts the power it draws. For running costs, note the 210 lumens per watt, which is how much light each watt buys.

The maker lists it for use outdoors, so it suits anyone replacing the lamp in a large outdoor fitting. It is rated IP65 except for its cap. IP65 means sealed against dust and protected against jets of water, but because the rating stops short of the cap, outdoors it goes in a fitting with an appropriate protection rating of its own. Its 320° beam angle sends light almost all the way round the tube. The light is 4000K cool white, between warm white and daylight. Colour rendering is Ra 70; the index runs to 100 and measures how faithfully colours show, so where colour must be judged closely, look for a higher figure.

It runs on a 220-240V AC mains supply and is not dimmable, so it belongs on a plain switched circuit rather than a dimmer. Rated life is 50,000 hours, more than eleven years at twelve hours a night. Before you order, we suggest checking that the lampholder is E40 and that the fitting has room for a tube 232mm long and 52mm across. Inside the clear glass, the LED filaments run lengthways along the tube. Switched off they look yellow; that is the phosphor coating, which turns the light from the LEDs white. Switched on, the lamp gives cool white light.

Product Specification Sheet

Range Datasheet

Will this fit the lampholder in my fitting?

Only if the lampholder is E40, the Goliath Edison Screw, which is much larger than the E27 screw or B22 bayonet of an everyday household lamp. The tube needs room too, at 232mm long and 52mm across, so measure inside the fitting before you order.

Can I use it outdoors?

Yes. The maker lists it for use outdoors and rates it IP65, which means sealed against dust and protected against jets of water. That rating does not cover the cap, so outdoors it must go in a fitting with an appropriate protection rating.

Will it work with the ballast in my old fitting?

It is rated for a 220-240V AC supply at 50Hz, but the details we hold do not say how it behaves with a ballast or other control gear left in an older discharge fitting. Ask a qualified electrician to check the wiring before you fit it.

How bright is it compared with the lamp I am taking out?

It gives 9,000 lumens from 42.8W and is rated to replace 477W. Check the lumen figure of the lamp you are taking out as well as its wattage, because lumens measure the light a lamp gives and watts measure the power it draws.

Can I use it with a dimmer?

No. It is not dimmable, so it belongs on a plain switched circuit. If the fitting is controlled by a dimmer, you need a lamp that is rated as dimmable instead.

Why does it look yellow when it is switched off?

The yellow is the phosphor coating on the LED filaments; the coating turns the light from the LEDs white. Switched on, the lamp gives 4000K cool white light, not yellow.