400 gallon project

[GreenSpottedPuffer]

Glad to hear you figured it out!


There is a big thread on RC about how quickly PAR levels drop off and with what bulbs. I think it was pretty much determined that the biggest drop was after a few months and then the next year was pretty minimal.

I would have to go back and read (too lazy) but in the first 3 months, most bulbs dropped to like 70% and then a year later were around 65%. Or somewhere around those numbers anyways. One guy tested for 1.5 years and was still at 60% of the original output and stayed there until the burned out.