setting up electrical feed for future grow room

[viper]

a indoor 50amp subpanel will run u about 30 bucks. u can use #8-3 romex from your main panel to sub panel. a 50amp panel will cover all bases more than likley a normal room will be around 20-30 amps. if u dont use the full 50amps thats good but its good to know u have it.

50 amp sub panel -- buddyluv is running about 27 amps with everything on at once . DIY add up all the wattage to everything right down to the oscilating fan , everything you use should be UL listed and will have the watts listed as well , divide the wattage total by 240v (sub panel ) and you have your sub panel breaker size , like huh said bigger is better .
i would consider arc fault breakers and gfci plugs for added saftey maybe throw ya a smoke detector in there as well .