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Discussion Starter · #1 ·
Hi, I've read many threads and to be bluntly honest can't seem to get it. None of the situations relate well to mine so I am going to post what I've done and see if any of you folks who get it can help me out. ;)

I have a basic 10 gallon tank setup for my yellow shrimp with an assortment of plants from my main tank. The tank had a very basic hood with a flourescent 15w tube. The light was very concentrated in the center and the plants grew super slow.

Today I stopped at my LFS on a completely untank related trip and saw they had 10 gallon incandescent hoods with the 2 x 15 screw in bulbs on sale. The hood design is better, the lights more centered and lifted higher with very basic reflectors, plus from what I've read, screw in is better and lends itself to CF bulb upgrades. Afterwards a stop at Target had me holding two GE "Daylight" 6500k 15 watt (60 watt equivalent) CF bulbs. When I got it all home, the CF bulbs fit great so I swapped it out and powered them on. It looks great, very even light spread, much brighter and slightly greenish in hue though my Flourite substrate looks nice and red colored.

Now when I try to figure out watts per gallon I am stumped. Does that mean I have two 15 watt bulbs so roughly 3 watts per gallon? Or since they are compact fluorescent at "60 watt equivalent" that I have 6 WPG and have effectively overdone this? I dose excel every other day. I'd really like to not do CO2 in this tank. Should I step back, return the CF bulbs and just put in the 2 15w tube incandescents that came with the hood setup?

I'd like fast growth in this tank to keep it full for the shrimplets, algae would be ok too, it's not a show tank.

Any thoughts? Thanks. :)
 

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Discussion Starter · #7 ·
I took the CF bulbs out and put in the 15w incandescent bulbs that actually came with the hood. It looked like a dankly lit cave. The difference in the visible light was crazy. I'm going to leave the CF bulbs in for now and see if I get any noticeable plant growth difference. Maybe later I'll put in two 25 watt CF bulbs. At least to my eyes the 15w CF bulbs are 4 to 5 times brighter than the previous hood with a 15 w tube and no real reflector and the incandescent bulbs.

Thanks for the explanation though Hoppy. I'm gonna cross my fingers in hopes my 10 gallon isn't jinxed. ;)

-D
 

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Discussion Starter · #11 ·
Thanks for the links! I wonder if that ballast bit would be too big or if it would fit in my hood. I'm sure the non spiral bulb will be loads better than the spiral ones I have currently too.

I don't see what output the Colormax is; 6500k, 8500k etc.
 
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