[Aavso-photometry] Light Box- from what error to report in WebObs

[Brad Walter]

I Just use White LEDs in my light box. I don't think it matters if the
illumination matches the sky color since individual exposures are
monochromatic with my camera. I adjust the exposure duration and
intensity for the flats in each color to give about half to 2/3rds
saturation level in each color. Since the flat adjustment is a pixel by
pixel multiplication by a factor equal to ADUavg/ADUpixel as long as you
get good dynamic range in the flat without running into saturation
(except for hot pixels, of course), a mismatch  in color balance of the
light box just means exposures durations/ intensity knob setting, will
be different than a balanced source in the different color bands. It
would be a different story if the camera recorded all three color bands
simultaneously - That's an interesting issue to research before buying a
color CCD. 
 
Brad Walter
Director of Product Marketing
 
Active Power
2128 West Braker Lane
Austin, TX 78758
Phone: (512) 744 9414
Fax:     (512) 836 4511
bwalter at activepower.com