Recommended fluorescents for cyan colour cast
Posted 08 February 2014 - 12:39 PM
Posted 08 February 2014 - 12:42 PM
I'd go by price -- if someone is selling Cool Whites for a dollar a tube, they are probably fairly greenish.
Posted 08 February 2014 - 01:04 PM
Posted 08 February 2014 - 01:23 PM
I'm on the point of replacing 16 tubes with better ones, but they're warmish and go sickly yellow, not blue, and they probably aren't worth shipping.
You might try looking for things advertised as "halophosphate." This is the fluorescent tube equivalent of "Auto Stop" on a cassette deck, when they've got literally no features to shout about. All modern fluorescent tubes are halophosphate*, and the only reason anyone would shout about it is if it wasn't triphosphor. And you don't want triphosphor, because the purpose of triphosphor technology, which uses RGB phosphor blends, is to have better colour rendering than halophosphate, which tries to make white light with simpler physics.
So, that may help. But basically, get cheap cool white ones with a CRI below 75, they're going to be cyan as hell.
* Edit - actually I was wrong, this isn't quite true, but the rest of it stands.
Posted 08 February 2014 - 01:32 PM
Posted 08 February 2014 - 01:41 PM
To wit, just so we can see what we're on about...
Cool white (this is probably a dual phosphor tube with reasonable performance for everyday use, but not a precision device):
Deeply nasty halophosphate junk (warm white, this one, hence the big peak in the yellow)
Philips "natural sunshine", presumably triphosphor:
Posted 08 February 2014 - 05:12 PM
At least then you would have half a chance to match any film lights to the cyan colour.