Question about lights

Question from a fellow grower:

I built my box . It is 4 foot wide 12 inches deep and 8 ft tall. I ordered the gold leaf seeds that is why so tall. I am.trying to get the light right. I have 1 9000 lumen metal.halide bulb for the space
I coated the onside with elastomeric white paint for reflectoon. Is this going to be enough light for the gold.leaf strain or what should I supplement with

How many watts is your metal halide?

Did you use flat white paint? Glossy paint should not be used; FYI. :slight_smile: