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Hi Paul
I used torch bulbs – 4 of them wired in series. I think each bulb was rated 3V 1A or thereabouts.
This gave me figures of 12V at 1A so I purchased a 12V 1A mains adapter (actually variable 3, 6, 9, 12V) and using the ST7E CCD camera (very sensitive) on the C9.25 my flat field exposures are around ½ second at a setting of 6V on the mains adapter.
I now have to re-think the whole design, as I am moving into the world of LRGB imaging so I think I will need an illumination source more balanced to daylight (5800K) rather than the 2500K of the puny torch bulbs.
I was thinking of high intensity (3000mcd) LEDs if I can find their output spectrum and somehow overcome the narrow field limitations.
Cheers
Dennis
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