I don't think it helps during your vegging process, but once you've harvested your plants, then drying / curing your buds in darkness is a must.

Check this out - Drying and Curing Cannabis - The Final Critical Steps | The Grow Closet.com

Good luck!
Nirvanabud Reviewed by Nirvanabud on . darkness for the last week? hello every1.. it this true, does it help with the thc? Rating: 5