15 Nov
2005
15 Nov
'05
4:27 p.m.
On 11/15/2005 at 1:26 PM Bj??rn Vermo wrote:
> Green Green . I want green! . The sun is green
... ears are pointed ...
Well, there's always low-pressure sodium vapor (turns everything yellow).
:) Any fluorescent lamp is going to have a very jagged spectral output
and will photograph badly, which limits you to incandescent lighting. For
photography, you can't beat standard photoflood lamps.
People who need to evaluate colours often use
neodym/praseodym (a.k.a.
didymium) lightbulbs. They have pinkish bulbs, and give a light which is
very daylight-like even at modest power. I got some which were made in
Finland (by Airam if I recall right). They seem to be rare and hard to
get.
I've seen them on eBay, but they're usually pretty expensive. I've also
wondered about the useful lifetime of the bulb.
If you're looking for floodlamps, you can get standard edison-base floods
(e.g. R40 size) with a blue coating that will shift the spectrum a bit
toward the blue. These are marketed as "Grow Lights" and quite reasonably
priced.
I suspect that plain halogen flood lighting (available in edison base)
would be fine for most viewing applications. Search on eBay for "halogen
bulb" for some ideas.
Cheers,
Chuck