Good afternoon, everyone!
I have been meaning to get an update posted on my new lights. It took a few days, but here we go...
While my original inexpensive purple LEDs have been working just fine, my longer-term plan is to end up with a veg tent and a separate flower tent. Maybe in the fall I’ll get the second tent, and then I’ll use the purple ones in veg, but wanted a white-light, more intense light for blooming.
I did a fair amount of searching, through Google as well as here on 420, in particular on the Lighting forum. I was a bit constrained both by budget, and also by options available in Canada (otherwise paying a lot for shipping and duties/tariffs, etc.). I really wanted to try to support any one of the
sponsors here on 420, but I wasn’t able to find something within my budget, or timeframe, or both. I am not particularly handy, and so I didn’t want to go the DIY route, at least for this first time.
I kept hunting, and as luck would have it, I came across a guy who is located less than an hour away from me, who offered what I thought were pretty good lights, for a price within my budget. No shipping, as I just drove out to pick up, which was a big win for saving money, and time. It was a bit of a gamble going with a lesser known option, but I think that it has worked out well!
I ended up getting two similar units from him.
The first unit is quoted as "238W," coming from three strips of 144 Samsung diodes each, for a total of 432 diodes. The LED strips are mounted to a pretty thick/rigid plate of aluminum, which acts as a heat sink. It has a Meanwell driver - HLG-185H-24A, which I requested on a long enough cord that I can keep it outside the tent to further reduce heat. The colour temperature on this one is 3000K, which I picked specifically for flowering stage. It has an efficiency rating of 2.3 umol/j, and 181 lumens/watt. I do not have an exact PPFD metric, unfortunately, but some rough comparisons suggest that it will be in the 600 range, at 18”. I believe that the vendor is working on a PPFD map for the future.
The second unit is very much alike, but with a couple of key differences. The base colour of the three strips is 4000K, so skewed with a little more blue in the spectrum. The cool feature on this unit is that it has a “deep red booster sidecar,” which runs on a separate power supply. My understanding is that this additional red part of the spectrum is good for flowering. Therefore, I can run it the base unit at 4000K during veg, and then add in the red addition to the spectrum during bloom – the red LEDs don’t add a ton of additional lumens, but shift the colour slightly. Plus, it is just a cool toy.
Right now, I have both units squeezed into my 2x4 tent, and it is bright! Each aluminum plate is 9x23”, so they just barely fit. The footprints of light of course overlap, so I think I will be pushing over 1000 PPFD, at least for most of the canopy, and I get good light right in the corners as well. Each Meanwell driver has a built-in dimmer screws, one that controls voltage and the other controls current. I played around with the adjustments, as well as with my new “kill-a-watt” meter. I can dial in the wattage on each, any where from about 50W all the way up to 270W (vendor recommended not going past 240W). Right now, I have each one set for 180W, about 18” above the plants. With a total of 360W, divided by 8 square feet, gives me 45W/ft. Might be a bit too much, but it has been three days, and girls look good so far.
Someday, probably not until this fall or winter, these new lights will be moved to a new 4x4 flowering tent, and I’ll bring my original purple LEDs back to use in my current 2x4 tent for veg. At that time, I might get a third one of these new units. That would give me up to 3x240W divided by 16 sqft = up to 45w/ft. Would be happy to turn down the intensity, if required, but nice to have enough power if needed.
Finally, I wanted to say thanks to
@Old Salt - he was really helpful and patient as I was considering different light options.
I love this white light!
So now I am off to do a big defol this afternoon, as I will (finally!) be flipping to 12/12 and let these babies start their flowering gig.