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So far, they are good and bright , I bought two blue pop and two cool day. The last two coming tomorrow. One problem that I saw is a sag in middle, maybe it is because I have 5 ft long bulb.
The 24" ones do not sag. I am running them in my ATI 8 bulb and they are awesome. About the same shimmer as a Reef Brite actinic light if you have the blue pop color temperature.
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