Samwell Seed Well
Well-Known Member
Ok once agian i will reiterate your HPS bulb, doesnt have any advantage over a t-5 cfl bulb, and it cost more to run to produce less lumens, the comment about lumens an inch makes no sense, the size of the bulb doesnt mater you use the bulb in the most effcient way possible vert, horizontal what ever, but if you take shortcuts on the only thing that ensure your produce your just gonna be left wantingok if you want to compare a HPS lamp to your CFL bulb because they have the same spectrum the compare a 100w HPS lamp that has the same spectrum as your 100w CFL.
A 24w T-5 bulb may produce 4200 lumes but that's over the length of the whole bulb. Do the math and find out out many lumes per inch your 24w T-5 bulb puts out for the length then compare oh let me do it for you...
24w T5 bulb - 4200 lumes say its at 2 feet = 1w per inch at 175 lumes per inch
So the MH is about 2 inches wide from side to side so that would come out to 2 watts and 350 lumes what the T5 bulb would cover but lets say your running 2 of those T5s then that's 4 watts and 700 lumes in the same amount of space of 2 inches square so by that math the 70w MH can produce better growth in the same amount of space even a 35w MH produces more lumes per watt in the same amount of space.
Yes it may produce less lumes over the T5 but like I said the T5 bulb's lumes are spread out through the whole length of the tube and not in 1 spot.
you comparison ok
70watt HPS bulb produces one spectrum and 3000 watts or 6000lumans in your new internet example way to search and is tinny which means tiny plants which fine but it limits you
my t-5 lighitng ficture(95 bucks though) with three bulbs on is 72 watts and 12000 lumens and can light a 2ft plant or cover a 2ft area and get good yields, and be up to 4in away from bulb
you notice that nice white powder coating on you Hps bulb, thats make it a single spectrum, high cost cfl bulb waste your money if you want, on the 20 to 0z in the picture and im being generous