5000 k

[larrynews]

Will this grow algae on fuge 5000k led at lowes

[Bluewater]

I would go a bit lower in k. But should do ok if strong enough.

[Boonjob]

3200-4800 is best range

[Twizted1]

So is it just the Kelvin? Watts has nothing to do with it?

[Kenn]

Both

sorry got greasy hands at the moment or I would explain futher

[Boonjob]

Its the spectrum..... They use red the best.... The watts do matter but if your watts are in the wrong spectrum your gonna have bad results.

[Twizted1]

So would 3 watt red LEDs work?

[Bluewater]

Algae uses mostly red and some blue spectrum to grow the best.  440-460 and 660nm.

[Wall_Tank]

I'm running a Red/Blue/White LED fixture over my sump.    Only running about 20 watts of power.   The problem I have is that the red LED's that I have don't have optics, so it's not getting the algae.   Thinking about getting this for my red

http://www.rapidled.com/philips-rebel-es-660nm-led-with-60-or-80-degree-lens/

[Bluewater]

I'm running a Red/Blue/White LED fixture over my sump.    Only running about 20 watts of power.   The problem I have is that the red LED's that I have don't have optics, so it's not getting the algae.   Thinking about getting this for my red

http://www.rapidled.com/philips-rebel-es-660nm-led-with-60-or-80-degree-lens/

How far away do you have the leds. Try moving them a bit closer instead of having to buy new stuff. I have red leds without optics, over a 18" deep tank and they have no problem reaching the bottom.

[Wall_Tank]

How far away do you have the leds. Try moving them a bit closer instead of having to buy new stuff. I have red leds without optics, over a 18" deep tank and they have no problem reaching the bottom.

Too much splash potential on my sump.   I'm sure they reach the bottom, could just be overpowered by the blues, since they have optics.

[Boonjob]

Paul I have some spare 80 degree optics from rapid if you want some I have a baggy of them. You can just have some

[Wall_Tank]

Paul I have some spare 80 degree optics from rapid if you want some I have a baggy of them. You can just have some

Thanks....I have optics, but have the OSRAM red LED.....the chip is an odd size.   I was looking at some of my optics, I might be able to cut them up to make them fit

[rayviv]

Both

sorry got greasy hands at the moment or I would explain futher

Leave that fried Chicken alone Kenn