Hi Paul
Here are a couple of graphs:
- QE of ST7 (may be a later chip than my old parallel model?).
- SBIG filters in CFW8A.
I think the paucity of blue photons is due to me operating the bulbs at a low level of illumination. They glow with a dim yellowish colour due to me supplying less that the rated volts/current.
Cheers
Dennis