T5 light distance from plants? H.O.

Lynx1380

Lynx1380

Active Member
I have a 48" 4-58 watt bulbs T5 H.O. 6500k blue, 20,000 lumens total, how many inches can i keep these off my plants? 1ft? 2ft?
 
bro, be careful with those T5's, they dont fuck around.. i could get mine within a couple inches without no heat probs..but! the babys didnt like it, started bleaching on me..
if ur plannning on using them on mature big girls, say 3-4 weeks onwards, id get 'em as close as a mafugga
 
streetlegal said:
bro, be careful with those T5's, they dont fuck around.. i could get mine within a couple inches without no heat probs..but! the babys didnt like it, started bleaching on me..
if ur plannning on using them on mature big girls, say 3-4 weeks onwards, id get 'em as close as a mafugga
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well the closest i could get my 1mo olds to it was about 8 inches away for now....the babys...(1 week old) went under the T8's (6500k)
 
Lynx1380 said:
I have a 48" 4-58 watt bulbs T5 H.O. 6500k blue, 20,000 lumens total, how many inches can i keep these off my plants? 1ft? 2ft?
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I have the same set up, I keep my T-5's about 4" to 6" above the tallest plant. Good luck but keep the lights down!!
 
I would say the closer the better. For seedling and new cuttings you can get away with more distance maybe 6-10 inches. In full veg and flower I would get them within 3-6 inches if possible. As long as you have decent air circulation under bulbs.
 
I keep mine 2" tops, it loves them, I just took a pic today, I was going to flower under hps, but haven't gotten around to getting it up yet.

20141016_162603.jpg
 
you want your t5 as close as possible. Not to.close to prevent spectral blend. T5 is linear and not a single point of light. Inverse square law. . So about 4 inches from canopy is.perfect. Heat will be where ever the drivers are. Depending on how the drivers are vented. Hydrofarm t5 put out less heat than quantum bad boys and htg t5's.
 
hyroot said:
you want your t5 as close as possible.
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I'll second that. I don't even worry about spectral blend really, I just wanna get em as close as possible.

P1060793_zpsffee7627.jpg
 
I kept mine close, sometimes 2-3 inches from the tops of the plant. As long as you can keep it cool get thise light right on top of the plants. If temos are higher then 4-8 inches is good. If you go past 12 inchew you will get stretching.
 
hyroot said:
you want your t5 as close as possible. Not to.close to prevent spectral blend. T5 is linear and not a single point of light. Inverse square law. . So about 4 inches from canopy is.perfect. Heat will be where ever the drivers are. Depending on how the drivers are vented. Hydrofarm t5 put out less heat than quantum bad boys and htg t5's.
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Is that from seedlings
 
I’ve had my plants within an inch, with the only damage happening from leaves that touched the bulbs. Sunblaster horticultural T5HOs.
 
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