1st off put a piece of tinfoil or aluminum foil on top the eggcrate where the light would shine in the tank cuz that spectrum of light is IDEAL for algae growth in aquariums! Make sure none of that light is entering the tank!
2nd that bulb may not be the best for vegetation, from the link:
Why there is Dual bands,tri-bands or 6 Bands?What is the difference?
More bands does not mean a better light. The light spectrum used in this Hydro LED contains the most efficient and proven wavelengths for flowering. For over 4 years, Lighthouse has refined the wavelengths of their LEDs. The 90W UV model has a majority of LEDs in the 660nm, 630nm range which is perfect for flowering. This light will work for VEG also, but if you are looking for a VEG/Clone light only then we would suggest the 90W HO (High Output) LED, which has a higher concentration of white LEDs.*
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Cheap way to decrease nitrates and keep your fish healthy:
http://monsterfishkeepers.com/forums/showthread.php?t=504763