Needing to know adequate lighting for grow room

I'm setting up a grow room for flowering 4ft wide 5ft high 2ft deep.

Currently running 1 x 600w HPS for this space. I have excellent air circulation and temps are at 75F.

Will this 1 HPS 600w be enough?

yes. i have a 400 watt in a space thats 2x3x4 and it works lovely im sure the 600 watter will be fine and a good 6 plants in that area should work wonders for you.

i personally recommend a 600 for a 3x4 space, i know adverts say its good for a 6x6, even 4x4 for a 600 just may be perfect, your plants on the outer edge of the lights footprint wont get much so rotation may be perfect for your scenario

Thank you so much people.