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why are you starting with such a large space. wouldn't it be better to set up a sngle 1000watt HPS/MH grow light in a corner of that tent and grow a couple of plants under that light until you get things figured out

what do you think is missing from the spectrum?

on paper these look very good 142.5 ppfdropping to 98.5 at 2ft from center.per bulb. 6 bulb unit. nice SPD . very uniform light distribution. https://www.amazon.com/dp/B07QWV1THV/?coliid=I5Q4D0N744COE&colid=AW7UKM9ED6GM&ref_=lv_ov_lig_dp_it&th=1 855 ppfd for 6 bulb. 2 year unlimited...

don't know if this will help 852 ppf 2 year unlimited warranty for$99...

I use this in a 2ft by 4 ft tent https://www.amazon.com/dp/B0002F5544/?coliid=I2DMX3I3GMRJLY&colid=AW7UKM9ED6GM&psc=1&ref_=lv_ov_lig_dp_it ad see a noticable improvement in taste and potency even in a T5 grow. I have tried reptile bulbs but had to keep them 24 inches away from the plant to...

your plants would benefit from running 660nm during the entire lights on period and then 730nm for 10 minutes after lights out and maybe a few minutes mid day to get the Emerson effect but keep in mind that greenhouses use deep red to prevent flowering during fall and winter. I'm a T5 grower...

most studies I have found use 365nm because this is the absorption peak for fluorescent materials and commonly used in black lights but the absorption spectrum seems to be broader for plants

why not jost use a constant current driver and just make uoop strips?all the diodes you will be using have a forwaed voltage of 3 volts except the far red and photo red which are around 2 volts. it is common practice to run diodes at 50-75% of their maximum current. unning those diodes at 600ma...

just foung this thread. tomatoes can be grown under just red and blue LEDS but they do better if UVA(365nm) is added https://journals.ashs.org/hortsci/view/journals/hortsci/53/10/article-p1429.xml

have you looked at these...

show me your faith without works and I will show you my faith by my works

I like fabric pots. they seem to help aerate the soil and give better growth

aerogarden hyrro. common form of hydro where the roots are sprayed with aerated water instead of being immersed in solution

you could try adding some 660nm diodes and maybe a little UV https://www.amazon.com/dp/B0002F5544/?coliid=I2DMX3I3GMRJLY&colid=AW7UKM9ED6GM&psc=1&ref_=lv_ov_lig_dp_it. you could try LST to keep the plants shorter to compensate for the lack of penetration. is you grow area surrounded by mylar...

not enough those pots need to be filled to the top

I would just leave it alone those leaves may recover and the rest of the plant looks good

I've used these for 4 years https://www.amazon.com/dp/B00NMYLOBU/?coliid=IBO3BJZOGQZOE&colid=AW7UKM9ED6GM&psc=1&ref_=lv_ov_lig_dp_it I use 4-6500k for veg and add 2 of these for flowering...

T5s are not intense enough to flower? even CFLs will flower

I see no uv in that bulb https://www.htgsupply.com/products/agromax-4-foot-t5-pure-par-bulb-2/ perhaps your confusing it with the pure veg plus UV https://www.htgsupply.com/products/agromax-pureveg-plus-uv-t5-bulbs-4-foot/ using those to add 4% uva would cost almost as much as a...

comparing lumens only works if the same SPD to determine actual output power in the PAR range you need to divde lumens by L.E.R. for HPS LER is 450 for MH it's 320 so a 400 watt MH has the same radiant power as a 400 watt HPShe difference in the way they grow is due to different SPDs