400 Watt hps Trainwreck and AMS

The tent is 20x32x56

400 watt lumatek ballast with hps bulb

vegged for 3-4weeks

This is 10 days in 12/12

They are 19inches tall

4 A.M.S Greenhouse

2 Trainwreck Greenhouse seed company


Just want opinions on how im doing...This is my first real grow

I want to know what to expect in terms of yield in such a small tent with a big 400 watt

just curious how much you heat a 400w produces?

hey i have a 400 watt hps and it doesn't really produce much heat. my plants are 10 inches below and cool. no cool fixture, just an open wing.

Yield depends on much more than just the lights and space; nutrients, temperatures, CO2 levels and how good you are at taking care of problems that pop up. If you can control all of the variables than there's no reason you couldnt get 0.5 grams per watt (which is about average) or more. I had a similar grow using a 600w with 6 plants vegged four weeks and got about 1.5 oz per plant (which was low, we had issues with temperatures). I would estimate youll get about an ounce per plant; maybe a little more, maybe a little less.