02-07-2012, 03:49 PM
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Originally Posted by stevenjohn21
It's a 12" T5 bulb. I ordererd a bulb that's 8000k so I'm thinking after reading watts are not as important as the kelvins that my new light should be ok
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The Aqueon tube you linked a couple posts back will not light in your fixture. You have a T5, so only T5 tubes will work.
If you have a T5, it is likely HO (= high output) so the intensity (brightness) is much higher than a comparable-size T8 tube. Here again, watts is rather meaningless.
The Kelvin is the colour temperature of the light produced; around 6000K is equal to the sun at mid-day, lower number is warmer (more red, less blue), higher is cooler (more blue, less red). But this is just the colour we perceive. The actual spectrum (determined by the phosphors inside the tube) is what matters. Sometimes the two relate, sometimes not.