size of grow room?

Hi there, i am going to make a box so i would like your opinion about this...
is there a problem if the plant touch the walls of the box?
i am thinking of making 1meter and 25cm height and 45cm width and 45cm depth for 2 plants
i am going to put 2 easy ryders 1st grow with 250w hps (easy ryders of The Joint Doctor's gens Automatic AK47 x Lowryder #2)
tnks 4 reading

I don't think that is going to be enough room for any of the dimensions. you need about 8 inches of room from the light to the plants or they will get burned. Also, you are going to have a lot of ventilation issues in a box of that size. it doesn't matter if the plants touch the walls of the box but it does if they touch the light.

tnx mate, i calculated that the space between the lamps and the plant will be about 8-9 inches at the last 2-3 days because easy riders can reach a maximum
of 31.5 inches as they say... but tnx again... i will give a little bit more space for them to grow.now for the ventilation i am going to use a rack 125mm that can extract about 250 cfms with a huge filter u think i will have a problem?

thats enoiugh room if your familiar with advanced growing techniques such as sog or scrog. Must also be an excellent pruner. If your a noob though, thats too small. I just finished easy ryder. They all got about 2.5-3ft tall. (grown naturally) so your 1m high box will be just big enough to put your plants in but there will be no room for ANY equipment whatsoever. make it bigger man. You dont want to cramp your ladies