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LED vs HPS by Shitting Blasslefoot - Thu, 12 Jan 2017 08:40:50 EST ID:aA2vxYkU No.143880 Ignore Report Reply Quick Reply
File: 1484228450404.jpg -(4664780B / 4.45MB, 5312x2988) Thumbnail displayed, click image for full size. 4664780
so ive been told you can get as good results with leds as you can with hps im skeptical but id love to be proven wrong can anybody confirm or deny this
15 posts and 2 images omitted. Click Reply to view.
Augustus Bomblelire - Thu, 19 Jan 2017 19:21:43 EST ID:+feR4wOL No.143931 Ignore Report Quick Reply
1484871703829.png -(221185B / 216.00KB, 800x344) Thumbnail displayed, click image for full size.
These are probably so new that nobody has gotten around to using them yet.

In case you're wondering *how good* the 3000K LED spectrum matches I found a chart. There ought to be slight differences depending on the manufacturer but you get the general idea...
INTERPOL !3mB4iDBpWw - Fri, 20 Jan 2017 01:25:24 EST ID:w/eMcEZe No.143937 Ignore Report Quick Reply

I can't bring myself to agree totally with this graph, UVB in the 375-395nm range will help the plant to produce more resins as a defense mechanism against getting sunburned. This has been shown by using UVB reptile lights in bloom, and they spike in the blue range instead of the red which otherwise shouldn't help at all in bloom.
INTERPOL !3mB4iDBpWw - Fri, 20 Jan 2017 01:31:09 EST ID:w/eMcEZe No.143938 Ignore Report Quick Reply

COBs are easy to cool because all you have to do is use thermal glue to attach them to just about any size CPU heat sink, then affix the proper 90mm fan that goes onto that cooler. The sky is the limit, you can even water cool them if you want to push a 100-150W rated COB to 175-200W. Otherwise heat buildup is what kills them quickest.
Augustus Bomblelire - Fri, 20 Jan 2017 04:12:19 EST ID:+feR4wOL No.143939 Ignore Report Quick Reply
Isn't UVB shorter wavelengths than 375-395nm? That is UVA to my knowledge. And AFIK no other light besides specialized florescent bulbs provide it, so if you want the benefit you'd have to supplement it either way.
Fuck Movingworth - Fri, 20 Jan 2017 11:47:04 EST ID:lE51QiPd No.143943 Ignore Report Quick Reply
LEDs have always had trouble producing UV light.

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