How do I decrease yellow spectrum?

[henpecked]

Hi everyone,

Here's my dilemma:

I have a double T-5 108 watt light strip with one 6,700K daylight bulb. I want a whiter light to better show the fish. I was thinking of adding a 10,0000K daylight bulb to the 6,700K :confused: Have any of you tried this combo? What can I expect before I shell out the bucks.

PS: this is a low tech, low light, discus planted tank.

[Ed13]

Just stay above 8,000k and on most brands you'll avoid the "yellow look". Changing to at least one 10,000k bulb would give you more of a crisp "white" look, while plesantly keeping the color on blues and greens but reds will suffer just a bit. Sadly, in my opinion it's all a trial and error thing untill you achieve the look you want.

[henpecked]

Thanks, Ed. I'll see what else I can obsess over now

[jcardona1]

Giesseman Aqua Flora and Midday bulbs :)

[Dave B]

I like the AquaGlo. I think it's 18000k but it really makes everything pop. It's great for oranges/reds especially. I would think one of those combined with a 6700k would be the best of both worlds.

I briefly ran a 10000k with a 6700k and the greenish yellow feel of the 6700k still shined through. The 10000k might've been past its prime though.

[henpecked]

Thanks again. If the 6,700 -10,000K combo isn't what I want, I know where to go:)