Sure you can use them, depending on what you’re trying to do you may need quite a few though.
The numbers are just giving you specs on the bulbs. Less than 100 lumens per watt isn’t stellar by led tech, about the same output as T5’s. If you’re mixing the color temps, you’ll want more 5000k’s for veg period and more 2700k’s for flowering.
Before you spend a bunch on the adapters, there were some multi bulb fixtures on amazon for about $10.
Any other questions and I’d be happy to try and help.
I’ve grown these with two similar, 15 watt, 5000k bulbs. I have no intention of upgrading any time soon. The plants are happy, and they’ll be under 175 watt led panel for flowering. They are this big, with short internodal lengths, at only five weeks old. Those are 3 gallon pots.
Well that’s about average for those bulbs. But the lights that a handful of us out building are in the 150-200 lumen/watt range. Granted, it’s going to be more work and more expensive than plug and play with some a19 bulbs. You can go from relatively mild to pretty wild.
I use the following splitters with 15 w 5000k for veg and 15w 3000k for flower. Right now i have two 7 bulb splitters and one 5 bulb splitter. Two 7 bulbs are in my flower tent with a 200 true watt COB. I use the 5 bulb for veg. The 7 bulb 15 watt splitter gives me about 107 true watts.
Usually about 8 square feet, 2 x 4. At the moment I’m flowering a single auto on one end under about 300 watts of flouro and LED, including 8 of these 2700K. Now that we’re legal, this space will be mostly for veg/seedlings and/or a couple of plants at a time for breeding and seed production.
The only problem with these is that they cost about twice as much to run as the most efficient COBs. If your electric bill is killing you, RapidLed has some nice COB kits that will cost less to run if you don’t drive them too hard. If you are thinking about growing for years, it might pay to change. But maybe you have excess solar power and pay nothing.
I’ve seen a few people get down with bridgelux and Samsung strips using the thermal transfer tape in them. You just don’t want to run drive currents too high, as most will not pull heat as well as aluminum.
Looking at starting a beginers grow. Without investing alot of cash. Your grow seems quite interesting and i have similar equipment.
I would just like to confirm a few things.
You used 2 x 15w led bulbs =30w ?
The bulbs were 5000k each = 10 000k ?
From seed to this stage roughly took 5 weeks ?
Could you please maybe share pics of the lights used .