Hello Everyone, I am Diesel from Vancouver island. I am new here and hopefully posting my question in the right place. I currently have a gorilla grow tent 5x5 set up to 6ft 11inches. (I'm not using the 1ft extension) for lights I am using two 600watt "Vipra Spectra Reflector Series" led panels. I really like these lights for a few reasons. Low heat, low power usage and I've had great results in the past using a Vipar Spectra 450w Reflector series. Anyway there are a few down sides to using these LED panels. Or any led panels for that matter. But the down sides I'm expieriencing is there's not much canopy penetration as compaired to a HPS. which isn't a big deal anyway since I'm planning on doing fast veg cycles (4-6 weeks) and I'm using the see of green method. The other down side I'm facing is coverage area. While trying to keep the led panel 18-24 inches away from the top of the canopy I am not getting much coverage. I have twelve #3 pots arranged in 4x3 rows. Pots are full of soil and there are touching edge to edge. But the outside edge of the outer row is now getting much light. Now I know most of you will say forget the LED pannles and go with HPS or MH. And if it is electric usage & heat I'm concernaed out then use T5's. The reason I started with LED's is because previously I converted four double wide steel lockers into Grow lockers. They were 18" length 30" wide and 68" tall. Not a lot of space so keeping heat under control was my main concern. Two plants paired with a 450w led panel was perfect. Heat was only 2 degree C above room temp. And the results were good. 18 hours of light for 6 week veg and 8 weeks flowering with lights on for 12hrs. Produced 83 grams dried weight of sour diesel. Plants were about 30 inches tall at harvest. My problem now with the gorilla grow tent is I am not getting enough coverage from two panels. I currently own one Vipar Spectra 600 watt reflector series, One Vipar Spectra 450 watt reflector series. And I'm currently borrowing from a friend: one Vipar Spectra 600 watt reflector series. I'm using both 600's inside the 5x5 tent (1200 watt equilivant). And the 450 was being used for clones/veg in a separate area. The options I am considering are: 1) Buying 2 additional Vipar Spectra 600's at $289 each. And in the future buy a 3rd one when I have to return the one I am borrowing. And use four 600w panels in my 5x5 tent (2400 watt equilivant) 2) Buy three more 450's so I own a total of 4. And use all 4 in the tent for a total of 1800 watt equilivant. 3) Third option is I just raise my two 600's to a height above 24 inches to gain more coverage area but at a lesser intensity.