ok so atm i have been going with my 55 gal with a single t8 bulb, not sure what the bulb is as i got the tank and everything free off craigslist, i do know its made by glo power glo its a 40 watt t8, bluish white in color, was wondering about switching to this aqueon one seen here, http://www.aqueonproducts.com/products/t5-dual-lamp-fixture.htm# would like all input thanks.