[Aavso-photometry] Help with light Light Box Lamps

[Brad Walter]

A number of years ago I built a light box to be used for astrophotography
using white LEDs. I know, I know, I know, sacrilege for photometry. My light
box is the Don Goldman Design
http://www.astrodon.com/oldsite/LearningCurve.html using the Nichia
NSPW500BS LEDs. Although the spectrum of these LEDs is quite blue shifted,
they work well enough in R and V, are barely acceptable in B (even though
the LED spectrum is shifted in that direction), but trying to use them for
Ic flats, is a totally pointless endeavor (essentially no output below 700
nm). So I want to replace the LEDs with a 12V light source that has a more
even spectral distribution throughout the BVRI range. The little bit of
research I have done indicates that Xenon lamps would be a good choice and
there are some 5 watt 45 lumen lamps available from
www.unitedhalogenbulb.com that look like they might do the trick. The light
box uses four mini light sources baffled to shine toward the back of the
box, and with a suitable potentiometer in series, I think these Xenon mini
lamps would give me sufficient Luminous flux to do flats in any of the BVRI
filters in 10 to 20 seconds. 

Does anyone have any experience with Xenon or other low voltage mini lamps
for a light box?