Can you have to much light?

[kissman]

Thanks for all the answers so far. I think the best thing I can do is just start a new thread with pics of some of my SPS and ask for help with color. I am going to run all tests and post the new results and a complete run down on tank equipment, habits etc... I am not 100% sure its the lights I do think they contribute to the problem but not sold that its all the problem. I will also have to look I think I have some pics from when I first got them. I am off work today and plan on taking the time to start this thread and fix my problem. This will take some time to run tests and post this. Thanks and see you in the next thread later this afternoon.

 

[gbru316]

simple answer- no

There is no simple answer. Lighting tolerance depends as much on water movement, water quality and lighting spectrum as it does on light intensity.

You can most certainly have too much light. However, the amount of light that is considered "too much" is situationally dependent, so asking "is xxxxxxxxxxxx too much over my xxx gallon tank" isn't really a question that has a correct answer.

FWIW, I have 72 watts of LED over my 10g tank and haven't bleached anything. Others have bleached corals with 20 watts over a 10g tank. Why? I hypothesize that it's because I have a turnover rate of 150x (via mp10) and have included LED's that contribute to synthesis of compounds necessary for the xanthophyll cycle. Higher flow + proper spectrum = greater light tolerance.

 

[jda]

I ran 2 48" AquaSpaceLights over a standard 120G tank (4x2x2)... so 4 250W HQI and 2 150W HQI and the SPS and clams loved it. The clams really loved it.

I doubt that many have had this much light over a tank and it was definitely not too much for SPS.

 

[golfish]

10+ years ago I had a 150 gal sps tank that ran 2x400 watt Radiums, 1x400 watt Iwaski and 4x55 watt PV actinics..Best tank I ever had, most expensive tank to run I ever had:eek2:

 

[kissman]

I actually started a new thread with a complete run down of my tank with pictures of the coral

http://www.reefcentral.com/forums/showthread.php?t=2246049

 

[grcforce327]

Can you have to much light?

How about one of these over a 5g nano!
http://www.elightbulbs.com/Ushio-50...oogleBaseCSE?gclid=CKeDlreVqrQCFQSg4Aod4iIAWQ