Combining LEDs & HPS

[rennuRneerG]

Does anybody have any experience with Using LED and HPS lights for the same grow? Right now, my setup has 2 300W Full-Spec LEDs but It’s not going to be enough light for the amount of space I’m trying to grow in. And since I want to switch to HPS anyways, I was thinking about just trying to add a 600W MH/HPS into the setup.
Also I was wondering how many full-grown plants I could grow in a 30²ft room(3.5’ x 9’)? And 2 300W LEDs and a 600W HPS should be able to cover that much space right?

[happyday]

3.5’ x 9’ tent needs 3pcs 2 300W led grow light i think

[rennuRneerG]

So my 2 300w LEDs will cover it?

[happyday]

you mean the seller advertised the light is 2300W? did you test its actual output.

[rennuRneerG]

I don’t know how to. I’m guessing there’s some kind of machine to test it?
And are you saying I’ll need 2300W for my 3.5’ x 9’ room?how do you calculate how much light you’ll need for different amounts of space?

[happyday]

32W/sq ft is enough, your 30²ft room needs 900W in total,so 3pcs 300W (actual power) leds are ok. i am a grow light seller on amazon. generally, the light boasted 1000W actually is 100W. they always said it is equate to 1000W HPS and hide the actual output in description.

[Toker1]

You need to go by the actual draw. For example, I had a cheap 300w LED but the actual draw was only 130w. The light was weak at best.
For HID and cheap LEDs you need about 50 watts per square foot.
I run HPS and T5 lighting (for spectrum) together. I switch out the standard t5 bulbs for pure UV bulbs at the end of the grow.

[Spidermite]

Well for max yields I run 3 450 viperspectrum in a 2x4 tent. So about 630 watts. In a 4x4 I run 1000 watt hps but most here run 600 watt hps.