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One more thing - lumen can manipulated in the way you state. However, if measured correctly, lumen is still the best measure to use. Measure correctly means ensuring a correct, balanced spectrum.
Once again there is a catch! 6500 Kelvin is the correct spectrum, yet no manufacturer produces a bulb or LED that has a perfectly balanced spectrum. You have a choice of the better or worse. Also, hobbyists dislike the yellowness of the 6500 K output and buy an unbalanced spectrum weighted towards the blue. LED count can be setup to produce a Kelvin rating, but overall, they still offer a better balanced spectrum compare to MH and fluorescents.
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Joe Ramirez |
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