1982grower
Well-Known Member
sorry about the way my par post was written. i'm not a scientist. i believe i meant to say that with t8 and 10000k bulb the bulb claims 89%(thought 93) of its specrum is usable to the plant. its not 93 watts in any sense. sorry. and obviously t8 have no penotration. cri means nothing to me and doesnt really apply to weed i think. just how it views other colours under it. right? I just know that t5ho in the same par as a t8 and same spectrum will put out less lumens. but a denser consentration of lumens per square inch with the t5hos