T5 light distance from plants? H.O.

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?
 

streetlegal

Well-Known Member
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
 

Lynx1380

Active Member
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
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)
 

grandpa 1949

Well-Known 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?
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!!
 

KBkiller42

Well-Known Member
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.
 

Bomixius

Active Member
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
 

hyroot

Well-Known Member
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.
 

intenseneal

Well-Known Member
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.
 

West12345

Member
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.
Is that from seedlings
 

JayBio420

Well-Known Member
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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