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Please always follow your instincts. We're online all we can do is give crap guesses. You're there n know what you been doing or not doing better then any of us. I agree with you it's prob cal. Now if that's bc of a lack of, abundance of something or ph? Here's the best record I've found online...

Huh? You'll have enough for a 630w cmh but not a 600hps?

Not to say you can't use chm for flower but you'd be better off with 600 hps. For one thing 630 cmh is actually just 2 315 bulbs put together. So you don't even get a boost in effecientcy like going from a 400w hps to a 600. Also hps has a better spectrum for a dedicated flower light.

You'll prob want to use all 3 lights during flower. Then down the road upgrade your flower light n use the others for veg n mothers.

True if u buy from USA with a meanwell. I've got 16 288's n 1900 watt driver for 850$ wire's n all.

+1 for dc seed bank had my order out same day. Also had gl with everyone I've delt with on strainly.

Got ya, I agree that prob after 3 grows you'll want to upgrade. Just bc there's so much better and prices on A+ gear keeps plummeting. They had their place 2 yrs ago but not now.

Replacing? Why, do you feel they lose efficiency?

I'd go with one HLG-600H-54B bc I'm lazy n be less to wire and less plugs used.

Treat

Yup, 80$ on eBay https://endless-sphere.com/forums/viewtopic.php?f=2&t=66169&p=995128#p995128 Comes factory set at 54.5 volts 37.5 amp 93% effecient

16- 288 lm561c boards + heatsink + driver= 800$ (including shipping, taxes, everything) Why in the world wouldn't you buy direct from China?

Those sound great! Yet not a fem seed guy. I had a great experience with original dutch passion fems. Still didn't stick with me? Maybe the pollen chucker in me kept me away from them (might change that).

Is banana firecookie a possibility?

Personally for a 4x4 flower I think you'd be happiest with two hlg-320-54a drivers running 3 boards per driver. You could go with hlg-600 but the costs are very similar n the extra 40w will make a difference. Running each board at 106 watts will have your effecency to approx 167 lm per watt and...

What size area you looking to light?

For what he originally said nice about. To save ya the time reading. They say driver is factory set at 54v and 37 amps. Still have yet to wire it up and test to b sure.

Might not get the same price bc of quantity you order but hansion https://tophspcb.m.en.alibaba.com. The driver is an easton apr48-3g on eBay. Here's info on it https://endless-sphere.com/forums/viewtopic.php?f=2&t=66169&start=100

25$ a pop, 20$ for double heat sinks n 80$ for a 1800w 48v 93% efficiency driver

I said let there be light n there was a shit ton!