Mercury Vapor lights require a ballast box and also require a warm up period so that they are not useful for instant on applications.

I have heard about a new low voltage bulb that is as powerful as Merc Vapor but does not require a ballast box, are very small, last a long time, and I think are cheaper and more durable than a Merc Vapor. A lot of people use Merc Vapor for professional landscape lighting, but some don't like the "green marsian" glow they give to everything.

Dennis
TractorPoint

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