> So the only question is how could you cram 8 T12s into a 19.5 inch wide hood when the width of a reflector is 3" and you want some additional gap in order to close the hood. > > Aviel. Yes, the only question is space. My hood only has a flat white background as a reflector. It is also 12 inches above the tank. My hood has an inside width of 17.5 inches, but it is suspended and totally accessible. I have about 1.25 inches between bulbs. If you have a 19.5 inch width and you try 8 bulbs the clearance between bulbs goes down to .94 inches. You can't do this with reflectors (no room). If you are using good reflectors you probably don't need 8 bulbs. People are now saying that with the Aquarium Hobbyist Supply (AHS) reflectors and their PC bulbs 2 W/G is plenty. More like 3 W/G NO fluorescent with a flat white background. Its just a low-tech option. Not necessarily your best option. Steve Pituch ------------------ To unsubscribe from this list, please send mail to majordomo@thekrib.com with "Unsubscribe aga-member" in the body of the message. Archives of this list can be found at http://lists.thekrib.com/aga-member/