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References to DOE CALiPER testing must take into consideration that DOE is well behind this curve. Their Energy Star program will not consider the new retrofit tubes above 4100K. Go figure out that one. They also want 2800 lumen for a 4-foot tube with all this light directed at 120 degree beam angle...

Note: I am an independent consultant and contractor. I am not on the payroll of any manufacturer. Fellow professionals: I am wondering if these impressions have changed since LightFair 2010. I see a lot of people swearing by the HO FL in their postings, which with the right CRI is a good technology ...