Unusual lights

[Steve]

I was at asda earlier. Don't usually go there but spotted unusual light fittings outside. Two types.

One had a thick white tube (maybe 1.5in dia) curved into a circle approx 200mm dia with metal clamps at the top and bottom of the circle.

The others looked the same tech but the tube was bent into a rectangle with the metal clamps at the short ends, the long ends looked about 400mm long.

The fittings themselves don't look dissimilar to high pressure sodium fittings (the round tubes were in bulkhead type fittings and the rectangular ones in floods)

What on earth are they?

 

[Adam_151]

Induction fittings? http://www.thebulbco.com/200-watt-i...currency=GBP&gclid=CNeShrvvoM4CFS0W0wodzCEDXw

 

[Steve]

Induction fittings? http://www.thebulbco.com/200-watt-i...currency=GBP&gclid=CNeShrvvoM4CFS0W0wodzCEDXw

Yes! Never seen them anywhere else.

 

[Echo the husky]

We used to fit them a lot, they are basically florescent tubes without cathodes and are excited by coils around the outside of the tube, this allows the tube to last much longer as the inside doesn't get contaminated and blackened. You can buy little versions for home use that plug into standard BC lamp holders, should you want to have one of your own!