How much led light?

[millersteve383]

Hello all,
I just purchased a reef breeder 120w led light for my 28g nano. I have some Zoas and frogspawn and a few other LPS corals. I bought the light from pure reef and am having a little trouble finding info on how much light to run. There are two channels one of which is blue and the other is red and white color spectrum. The brightness goes from 0 to 100. I am trying to figure out how much light and how long to run this. I had 100 W compact florescence that I was running before and I have actually been getting some Brown algae growth from running these lights for six hours. Any advice would be greatly appreciated thanks!

 

[ff337]

I currently have my LEDs running 10% white and 50% blue for a 12 hour cycle. Works well.

I would start very low. LEDs are bright

 

[bcavalli]

I ramp up mine to a maximum of 90% blues and 35% whites. I started out at max at 50% blues and 15% whites. You can increase about 10% per week. They have posted a rump up / down excel spread sheet on Reefbreeder's website under the Faq page.

Here is the link to download:

 

[catgirl29]

I think I've been running my whites too high (at 45% -50%) if you guys are at 10% - 35%. Noticing some new algae. I'll turn 'em down.

 

[bcavalli]

Keep in mind your optics do make a difference. I took my 90 degree optics off leaving me with 120s. So my 120s are a little more dispersed than the 90s.

 

[ff337]

I too took my optics off

 

[millersteve383]

Thanks all! I really appreciate it. What should I max out at? It seems like a big light for the tank

 

[ff337]

This is where you need to experiment start low and ramp up. If you see bleaching dial it down some

 

[snowmansnow]

I'm a lot newer to LED than a lot of ppl here, but If you have a white and a blue channel.... a lot of ppl seem to land 40% blue and around 90% blue after everything is acclimated.