First off, you don't have to start every post with "massage to.."

Secondly, the International System of Units is based on the metric system.. so really it's all the same thing..no need for the ignorance comment.

And lastly.. you plan to have a 250watt hps with no ventilation and you want to add CO2?? I don't recommend this...and you should probably read into CO2 before you impliment it into such a small space...
BobBong Reviewed by BobBong on . First Time Grower Needs Help with Growroom!!! first time growing and first time to post...plz help. growroom dimensions = 150cm/5ft Height x 60cm/2ft Width x 60cm/2ft Length light specs = 250W HPS first i need help on making a reflector for my 250W HPs since here in senegal you cannot find reflectors for 250W HPS weirdly enough, you find the bulbs and ballast but not the reflectors. In my total growroom height of 150cm, 30cm is already taken by the pot height and another 30 cm max at the top to maintain the maximum light intensity Rating: 5