May 20, 2012 #1 Laser Aquarium Advice Addict Joined May 13, 2006 Messages 1,218 Location Michigan Is there any significance in the diameter of a CFL? For instance I have 2 13w t3 6500k bulbs, vs 2 15w t5 6500k bulbs.
Is there any significance in the diameter of a CFL? For instance I have 2 13w t3 6500k bulbs, vs 2 15w t5 6500k bulbs.