2 footers here.
https://www.digikey.ca/product-detail/en/bridgelux/BXEB-L0560Z-30E2000-C-B3/976-1760-ND/7907655
12 of those with a 185 24 driver would work great. That's what I'd go for personally.
Mind you that would be parralel wiring
Can't drive these past 1400 ma so you'll need more than 5 strips. You could get an HLG 185 1050 and drive 9 strips. It'll just require aluminum channel to cool. Driving the strips at 700 ma wouldn't and that driver could handle 14 strips. I wouldn't do less than that for a 3x3
Swear I saw 4 inch but I could be wrong. Either way, at 50 bucks a pop, it's not worth it. And no, i would do more than 2 strips. Not sure they can handle that much power and you'd be spending a ton on heatsinks and active cooling...
Okay so the minimum length of the strips is 1 foot. You can get em in 1,2 or 4 ft lengths. Or in a real but strips is the better option. That sink is just 4 inches long so it won't do. I would just use aluminum channel to cool and drive em softly. LED gardener has a nice tutorial on for...
The 3 that I've heard are reputable are Meijiu, Bava and Kingbrite. Was gonna order from Meijiu but 100 bucks shipping was too much for me. I'd pull the trigger if I needed several lights.
I get that. I was in the same boat not so long ago except on a more limited budget and with less options at the time.
May I suggest checking Migros YouTube channel. I needed to replace a dead cob and he sold me on the Logic pucks from Rapid LED. (highly recommended). He's surprisingly...
https://www.horticulturelightinggroup.ca/collections/all/products/qb96-elite-v2-quantum-board-engine
This X2 plus driver
Or
https://rapidledca.com/chilled-logic-2-x-2-led-grow-kit/
Just giving you a couple more options to consider. I can vouch for the RapidLed lights. Really like mine...
I'm assuming the HLG uses the older diodes while the atreum uses lm301b diodes. Be aware that you'll need a driver as well. Atreum is great value but consider shipping and duty fees.
He's Canadian though so shipping plus duty may hurt. But yes, cobkits is good and he can use it to figure out what components he needs. Digikey is the best source for cob/strips and drivers in Canada
Jordan of the Islands would be my number 1. His newest God bud and Blackberry crosses are fire. God's Dosi Pie is a winner.
I second Ace as well. Nice landrace strain crosses.
Jahseeds for extremely cheap but pretty good quality stuff.
http://ledgardener.com/samsung-lm561c-build-finishing-touches/
http://ledgardener.com/build-led-grow-light/
That's where I learned to build my cob setup. Those guides a a little older so they don't use the newest parts but theirs a driver calculator on the site that's pretty handy. All parts...
You have 3 good options with that budget. CMH, HPS or you can go the diy Led route. All good options. Diy would be my choice and theirs tons of great resources out there to help you out.
I've also seen a company called hortibloom advertising around here. Don't know much about them but they...
Hey 350
Both have advantages and disadvantages. I'm going to discount the cheap blurple LEDs here because they really aren't any better than a good HPS. I'll focus on Cobs and white SMDs here.
LED:
Efficiency up to ~2.20 umols per watt.
Ability for manufacturers to tune spectrum
Potential...
Their is limited research but Dr Bruce Bugsbee of Apogee is saying that in his testing, UV in small quantity has improved a plants water/nutrient uptake and he's noticed hardier plants.
Ive always been of the opinion that the sun has the ideal spectrum as plants have adapted to them over...