In , Van Chocstraw wrote:
Tony Hwang wrote:
beerismygas wrote:
there are two types of UV tubes for bug zappers: Black light & Black
Light-Blue glass

GEs website says the difference btwn BL and BLB is that BLB have dark
glass which traps visible light producing the maximum amount of UV?
this doesnt make much sense to me...having an opaque glass will just
trap visible light not generate more UV, right? or not? thx

http://www.gelighting.com/na/home_li...q_ballasts.htm

Blacklight-blue bulbs are designed with a special deep-blue glass that
filters out visible light, producing the maximum amount of ultraviolet
light possible. If you're looking for a blacklight that produces the
minimum amount of visible light for an especially sensitive area,
blacklight-blue bulbs are an ideal choice
Hi,
That means amount of pure UV vs. UV plus visibile lights.
Not more UV light.

Which one do the bugs like better?

I have experimented in this area about 30 years ago, and found insects
to be more attracted to UV plus visible, especially blue, than to UV
alone.

- Don Klipstein )