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You can run QBs just a few inches from the canopy if you dim them some. At nominal wattage, I usually have mine about 18-20 inches above canopy. They could be closer, but I like to have room to tend my scrog. I’ve never seen any burn or damage to plants with QBs, the worst I’ve seen is newly...

Not necessarily. The QB120 and QB132 are fairly large boards with relatively few diodes, so they can be run at nominal wattage without heat sinks, with performance similar to strip builds.

Why do you want to use a viparpectra?

Also, poke around at ledgardener.com

Maybe granny is starting a grow.

Looks like cannabis to me.

Total cost of your 300 watt fixture?

Sonoff work great for cycle timers. I like to take a power strip and install a sonoff midway up the cord. I have a few and use them for light timers, fan cycle timers, clone boxes. Very versatile.

Are you doing this in an effort to increase yields, or potency, or.…?

I’m curious why you are dimming the light? Why not just on/off?

Got a multimeter? Borrow one.

I can’t find any science that supports the theory that a prolonged darkness will speed flower initiation. As usual, I find lots of opinion and anecdotal evidence. But I’m probably gonna do it on this run.

It is commonly believed that 24-36 hours of darkness will speed the flowering initiation process. Do you think otherwise?

I’m ready to flip, today or tomorrow. I’ll shut off the light at the end of their day and I’ll give them 24-36 hours of dark. When should I start using the far red? At the end of their last day of veg, or at the end of their first short day? Also, they’re on 18.5/5.5 currently; shall I go right...

How many pot growers does it take to change a light bulb? We’ll never know, they’re still talking about when it should be changed.

It’s scrap steel. Part of modular shelving system. Just laying around the shop. It’s a little heavy, but it was easy and free.

All of the lighting options you mentioned would be great. I think you should also consider the ChilLed logic 5x5 kit from rapid. I know you said you didn’t want diy, but it’s easy and rapid will be there to answer questions.

Ouch. That’s a long time. Mine usually come up on the fourth day, sometimes the fifth. Never longer than a week.

I really like QBs and the ChilLed logic pucks. I couldn’t decide which one to use.

I made this little cutie today. 12 watts. Ignore the wirenuts, wagos are on the way. I won’t start using it for another week or so.