On Tuesday, 31 December 2019 17:49:11 UTC, Tim+ wrote:
Tricky Dicky wrote:
It looks to me like a sodium discharge bulb, couldnt say whether it is
high or low pressure type, certainly the high pressure type need a
ballast to work. Might be useful for an outside light but not inside
unless you particularly like a bright yellow light effect.

Richard


I dont think its sodium. Its a discharge lamp of some sort (a Philips
bulb) but I think it was a white ( or near white) light, not bright orange
or pale peachy orange.


It will be a high pressure mercury discharge light...Needs a ballast.
Go back and nick the ballast.
They are obsolete. More efficient hat an incandescent lamp but less than an LED