Our industry has enjoyed several leaps in fluorescent bulb technology; yielding more power and greater efficiency with each generation. From VHO to Power Compacts, the calling card of each new leading technology has been a jump in lumens per watt. Enter T5 fluorescents. A modest increase in efficiency over PC fluorescents is not the whole story here. The diminutive diameter of the T5 bulbs places little in the way of light rebounding from the reflector and offers a new benchmark in terms of the light produced making it into the aquarium for a significant and apparent improvement. *Important Shipping Information: Minimum order of 2 (two) T5 lamps, (Mix & Match), to qualify for our standard shipping fees.