Kanlux IP65 Speciality E40 36W Opal Non-Dimmable - Cool White 4000K

This is a high-power LED lamp on the large E40 cap, the Goliath Edison Screw (GES), made for the big fittings that took high-wattage discharge lamps. The bulb is opal glass, tall and egg-shaped, narrowing to a slim neck above a silver-coloured cap. It draws 36W and gives 6000 lumens, 167 lumens for every watt, and our specification lists it as replacing 327W. The light is 4000K cool white. At 90mm across and 230mm long it is far larger than a household bulb, so measure the inside of your fitting against both figures before ordering.

E40 lamp holders are found on large fittings: high-bay pendants in workshops, warehouses and barns, floodlights, and the big lanterns over yards and car parks. The maker rates it for use indoors and outdoors. IP65 means dust-tight and protected against jets of water; the lamp carries that rating everywhere except its cap, so outdoors it must go in a fitting with an appropriate protection rating of its own. Discharge lamps usually run through control gear inside the fitting, so if yours took one, have an electrician check the wiring before you swap. The 320° beam spreads light almost all the way round rather than as a spot, and 4000K is a crisp white, cooler than the warm white most homes use.

Opal glass diffuses light and hides the source behind it, giving an even glow rather than a bright point, which helps in a fitting with a clear bowl or an open reflector. The lamp is not dimmable, so it belongs on an ordinary switched circuit. Rated life, listed below, matters most on a lamp mounted high in a yard light or under a warehouse roof, where every change means a ladder or an access platform. The range also comes with the smaller E27 cap, for fittings with a standard Edison Screw lamp holder.

Product Specification Sheet

Range Datasheet

Is E40 the same as a GES cap?

Yes. E40 is the Goliath Edison Screw, often shortened to GES, and the 40 is the cap's diameter in millimetres. It is far larger than the ES (E27) screw found on many household lamps, so it will only go into a lamp holder made for E40.

Can I use it outdoors?

Yes, the maker rates it for indoors and outdoors. Everything except the cap is IP65, the rating for dust-tight and protected against jets of water, so outdoors the lamp must go in a fitting with an appropriate protection rating of its own.

Will it replace the discharge lamp in my old fitting?

It is made for the large fittings that took high-wattage discharge lamps, and it is rated for 220-240V AC. Discharge lamps usually run through control gear housed in the fitting, so we would have an electrician check how yours is wired before you change the lamp.

Will it work on a dimmer switch?

No. It is not dimmable, so it should go on an ordinary switched circuit. Non-dimmable LED lamps used on a dimmer can flicker or fail early.

How bright is it, and what colour is the light?

It gives 6000 lumens from 36W, in 4000K cool white, a crisp white often chosen for workshops and yards. Colour rendering is Ra 80, the usual standard for general lighting; colour-critical work such as paint matching generally calls for a higher figure.

How much room does it need inside the fitting?

The lamp is 90mm across at its widest and 230mm long, far bigger than a household bulb. Measure the inside of the bowl, lantern or reflector before ordering so you know it will go in.