28 May
2004
28 May
'04
12:54 p.m.
From what I've read, I believe the frequency shift is done by the use of phosphors to cause fluorescence. ---- Jim Cobb james@cobb.name On May 28, 2004, at 10:43 AM, Michael Carnes wrote:
Back at my old club in Boston, someone gave us a talk about the technology of those lamps. In essence, much of the energy is shifted down from near ultraviolet (somehow). The light is quite strong in the blue spectrum, so you have to be very careful if plan on observing.