Do mercury vapor bulbs require room heat in order to work?
We have a large warehouse space (with high ceilings) where we have @10 HID fixtures hanging. All but one of the bulbs light...and the one that lights is dim. All these bulbs were replaced, new, less than a year ago.
The tenant has not turned the heat on in the building and I was wondering if the cold weather is a factor in regards to these lights.