Just bought a p300 to give 2 of my plants on the outskirts of my 600w hps some light, reckon itl be ok over 2 plants @A-Train? Going to buy another somewhere down the line....
I've used one one P300 over 4 photos on one run and while it was a tight fit inside my 3x3x6 tent they still produced some nice dank buds. I now use two P300s in the same tent and have not finished my first grow with two of them, but can honestly say I placed them 24 inches away from the four auto seedlings and have never moved the lights or plants since. With two the big difference was it really slowed the stretch and the internode spacing is very tight. Now that they are flowering will be the big test for how much light penetration I get to the bottom of the plants and how dense the buds get.
 
I have 4 under a 600w and just aporoaching week 8, one has stretched like a mofo and the other 3 are shorter but a lot bushier with tighter node spacing and are already sticky and look like they'll put off some weight! The lanky plant I've trained the main cola over and it's already responding...Love that! The 2 on the outside are shorter and bushier too! Looking forward to the next 4 weeks that I reckon they got left
My led is abit closer than 18 inches but only because I havnt got spare rachets and won't have until Monday
 
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