LEDgardener

Hi there! I built 2 of my own Samsung f series strips using 20 of the 2 footers per fixture each one powered with an hlg 600. I borrowed a regular apogee par meter from my friend and was able to get some rough testing done. It seems that at 24 inches at full blast I'm getting a pretty even spread of 800ish range and then tapering off away from the fixture. When I first put it up I had it 24/7 full power and I had just got 2 clones, well they got extremely stressed even being way more than 24 inches away. It took me 2 weeks at 20% to get them back on track. I'm curious what people run for their veg's including big plants, small plants, and seedlings/clones? I currently have it dimmed to 50%. The way I have my plants layed out my two biggest get about 200-250 seedlings 150 and my clone dome not pictured is getting 60. I should also mention I switched to 18/6.

Whats the footprint for your lights? 4x4?

I think clones need about 100ppfd, and yound plants 200. At the size yours are at, I'm surprised your having a problem. I was running 2x4 with 300w of 90cri bridgelux strips. Plants at 2 inches at their closest towards the end. Perhaps 4 inches at the start of flowering.

Absolutely no signs of stress. The 90cri vestas are probably 5-10% less powerful then the eb-gen2

That's correct the size of each fixure is 4x4. Originally when I got those two bigger plants they we're only in Solo cups and had been under a friend's mh 400w. When I brought it to my place and put it under that led full blast 24/7 all the stems turned purple and they haulted growth. Since then I've slowly day by day worked my way from 20% power to 50% power currently. What should be the ppfd for bigger plants in veg? I also forgot to mention these are 3000k 80cri

There was a fluence lighting guide here, but I can never find it with the search function. I think they said that for a non co2 grow 250is ok, and ppfd of 400 perfect (flowering). Thats why they made the spydrx for non CO2, and the + model with double the power and double the ppfd.

I guess 250-400ppfd is the range you are looking for, unless you have co2 and optimal environmentals.

Your light probably produces way over 1000ppfd?

I won't be adding any co2.
Testing with the black apogee original non full spectrum meter it's pretty hard to pick up over 1000 unless I'm almost touching the strip then it jumps up way high. Mostly if I'm underneath the 4x4 it puts out 750-900 in a 2-21/2 ft depth.

Because these are 3000k 80cri the sensor isn't picking up on some of that extra red.

So dimming it down to 50% you seem to be close to the higher end of recommended veg intensity, somewhere around 450ppfd

I'd say that's pretty close to accurate. They big plants are just outside of that 2 foot depth sweet zone so they're a little less ATM with the light up that high, in the 250 range right meow.

Dedgoldfish wrote: ↑

Thu Oct 11, 2018 10:49 am

When I brought it to my place and put it under that led full blast 24/7 all the stems turned purple and they haulted growth.

Are you adding Cal/Mag to the feeding schedule since going under LED from the MH?