Thank you for your question JetBlack. We do not generally gather lumen data, only PAR. Lumen is a measurement of how bright a light looks to the human eye and has no bearing on how good it is for freshwater plant or saltwater plant and coral growth. The only readings we have for the Lunar Aqualight Quad units are for PAR on all four bulbs on at once. At 12” from the light it gives about 90 to 100 PAR. We have not done Lux (lumen) tests on these particular fixtures at this time, but I hope the PAR values provided help to answer your needs.
answered 1 year, 1 month ago
Coralife Product Expert
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