Light heights

[MrNice]

This is something i want to look into ive been looking at apogee instruments to measure the par in my entire room once ive got all setup and saved some more pennies ill buy one and do some testing with heights, intensity and overall yield

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Hey donkey you will need a quantum meter for measuring umols of apogee not cheap tho

[MrNice]

Unless your using co2 any think above 800umols is a waste of energy plants cant absorbe it

[Keeno]

With the led's ive played with i let the plant tell me where it wants the light. Start high, lower every other day by a inch or 2.

Seedlings obviously need extra attention if using a higher power led with no dimmer.

[MrNice]

Me again....LOL

This is a subject mrnice has been playing around with for quite a while now light height and strength.

So far what i found out is that cos im in a small tent 60x60x140 the light must reflect more off the walls or some think as I know LUX is not for plants but for humans and we all don’t have a fat wallet to buy a quantum meter so as a guide we can use lux as we all have a smart phone etc

Any way one day GMo pointed out that my plant had leaf serration from the LED light being to close the lux reading was about 250000lux
So since then I’ve been playing around to see what light power my little setup can handle

On my melon grow I’ve been running that about 10w to 20w at the wall like 0.6 dc amps on the light panel the ISH150pro can kick out 2.1dc amps on full wack even now I’ve turned the current up to 0.9 dc amps and can see some tiny leaf serration and its only 24000lux

I’m way under half the power the light can kick out but think that’s cos the tents so small in a bigger tent the light would spread more

[Neilw420]

The way iv found it is closer with less watts just doesn't give the same penetrative. If you have 35k at 12" and 10k at 24, if you turn the light down and move ut closer that 10k 24" away turns down to about 6k. All as an example but uts how iv found it, so if my light has to be 21 inches I know im getting a good 18" of usable light.
If that all makes sense

[Captain Beefheart]

in my chamber atm i`m running 1275 watts of fun.......1 x 275 invisible sun panel....... 1 x 600 HID dual spec sunmaster........1 x 400 watt skyline panel. atm all the lamps are 14" above my canopy,thing is with LED the downward light heat is minimal unlike the HID,im finding rite now that i have a fine combo ! idk i`ll see what happens tho i think i`ll be buying another 600 HID and dirch the led ...... IDK yet see but heres my I.S panel at 14" ewe cant see the others i`ll get a panoramic pic up soon of all 3 bulbs.