Is 1000 watt HPS overkill in 4X4 tent?

Doug Dawson

Well-Known Member
yo to anyone coming accross this issue, i did and fixed it, so your ballast will work for either the hps or mh some will work with both. my reflector hood works with a magnectic ballast and my cool hood works with a dimable ballast. so maybe a dimable ballast for the mh and hps to both work dunno
In the end it was just a bad ballast. I retuned it and got a new one, no more problems after that.
 

J-black indica man

Active Member
Hello growing guru's. I am curious to get some experienced folks input. I have read a number of posts but wanted to reach out regarding overkill on lights. I have an Early Miss auto growing in a 4X2 tent which has gotten too tall so I put up a 4X4 tent. The 4X4 will be the max tent size I will use as I only have so much space and can only grow 4 plants at a time. I have 3 1200 watt LED lights (advertised as 1200 but you know, not really) and one started giving my trouble yesterday. I popped it out and put in my spare so all is good but trying to decide if I should buy an HPS MH light. I have read about heat issues with the 1000 Watt but am wondering if it wouldn't be overkill for my tent. The 1000 watt can be used as a 600 if I buy 600 bulbs and I believe 600 watts would be sufficient for my space so I don't know I would ever need 1000 watt. What are your thoughts? This is the one I am thinking about in either 600 watt or 1000 watt. https://www.amazon.ca/gp/product/B00P8PIOIC/ref=ox_sc_saved_title_1?smid=A2PQGFJXAT8J9K&psc=1
So you can definitely use a 1000w hps or mh in a 4x4 tent. Math says you need a 32.5 cfm fan for your size tent 4x4. So if you go with say a your tent is around 98 square ft. So a 300cfm fan will clear the air in the entire tent 3 time a minute. With the correct fan’s and proper exhaust and cooler intake you can run what ever light you want.
 
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