Which light wattage to buy?

[George Clooney]

Ok, so I am almost ready to buy some lights for my tent. I am growing in a SeretJardin DR120 which measures 46" x 46" x 78".
(or close to 4ft x 4ft x 6ft). I will be buying lighting kits that come with a ballast, a cool tube, a bulb, and an air-cooled rectangular hood. I will be growing 4 plants.

I understand that when using an air cooled hood, you lose quite a few lumens from your bulbs. Since my tent's width and length is pretty big, I don't think one light will be enough to cover all four plants, so I will be buying two separate kits so each bulb will evenly cover two plants. My question is should I go with two 600w bulbs, or two 400w bulbs? I'm sure most of you will think two bulbs is overkill, but I am going for maximum yield, and like I said before, the air cooled tubes will take a lot of lumens away.

 

[BxHaZe87]

600 w's u get the best light output

 

[sensimilla86]

Ok, so I am almost ready to buy some lights for my tent. I am growing in a SeretJardin DR120 which measures 46" x 46" x 78".
(or close to 4ft x 4ft x 6ft). I will be buying lighting kits that come with a ballast, a cool tube, a bulb, and an air-cooled rectangular hood. I will be growing 4 plants.

I understand that when using an air cooled hood, you lose quite a few lumens from your bulbs. Since my tent's width and length is pretty big, I don't think one light will be enough to cover all four plants, so I will be buying two separate kits so each bulb will evenly cover two plants. My question is should I go with two 600w bulbs, or two 400w bulbs? I'm sure most of you will think two bulbs is overkill, but I am going for maximum yield, and like I said before, the air cooled tubes will take a lot of lumens away.

idk if oyur nervous about electric bills or what but i think 2 400 will be plenty if its one over 2 plants but if your not then go with the 2 600 i will add though i use one 600 in a tent about the same size and get good results but i dont use the cooled tubes so i dont know how much you loose with them and i genrally have 4 big bushes and 2 smaller ones and just get the smaller ones on buckets or something so there canopy's are level but either way you go you have plenty of light for them
good luck man