Joseph Meehan wrote:

Wide spectrum lamps are good and they are the easiest solution, but you
will never see them in a commercial application where mercury vapor is
favored due to the overall cost savings. Over the total life of the fixture
the cost of lamps, fixtures and power strongly favors the mercury vapor.
Just ask any pot grower.


I think you are confusing mercury vapor lamps with high pressure sodium
(HPS) or metal halide (MH).

Regards,
Bob