That's a good question! Lol!
My old fixture was a combination of AquaFlora and Midday bulbs, six of each, at 54w a piece (Giesemann). Total of twelve bulbs HO T5's
My new Fixture are two TEK Elite 8's. That is a total of 16 HO T5 bulbs at 54w a piece. Per fixture, there is one UVL Red Sun bulb, one UVL Indigo Sun, and one Giesemann Aquablue; one fixture has three Midday and two AquaFlora bulbs, and the other has three AquaFlora and two Midday bulbs.