I see a lot of folks using the CFL bulbs with a clamp light. My question is what wattage of bulb would you use for a 10 gallon low light set up and how many (1 or 2)? I'm not running CO2 and don't want to, so recommendation on a wattage and bulb type would be helpful. I do have some cover plants that will block a little light.
i run two 23w 6500k cfl's over my 10gallon with no co2 for 6 hours a day. Plants have been showing promising growth upwards with reds starting to appear near the water level with pps pro dosing regiment.
This is considered high light and not recommended to someone new at planted tanks. Otherwise, go with dual 13w 6500k cfl bulbs.
Two fixtures are recommended as to provide consistent light across the 20" length of the tank...
Alternatively you can get a large dome shop light but you will likely need to get a higher wattage 6500k bulb and hang the light inorder to provide adequate light diffusion to the substrate level.
Thanks all. Looks like I'll go with 2 clamp style lights from Lowes with the 5.5 inch reflector and 6500K 13 watt CFL bulbs. I'll just watch for growth and start out running them around 10 hours or so and adjust from there. Thanks again for the help and any other suggestions anyone has.
for the record, i'm using 13w, 6500k, 12-13 inches from substrate, with the bulb vertically pointing down, and co2. it's still relatively new and i'm working out the kinks in balancing everything but so far i'm pretty happy with my growth rate. algae hasn't been a big issue for me.
if I were you, i would either do 1 of 2 things with a cfl bulb setup since you don't want co2 and want low light.
1. if you have a desk top lamp that positions the bulb horizontally, just use that right above the tank.
2. if you're set on using the work lights which you already bought, i would probably raise it 4 inches from the top of your tank, pointing vertically down with a 13W bulb.