some people say a few to ten days or a little longer a trap will turn red.
well just to let you know, my trap open up yesterday, its a brand new trap, and it is already got a reddish tent to it inside. i have been giving about 9 to 10 hours of direct sun a day. and it hasnt burned. and one more thing i am finally getting a hold on this CP growing. i have had my VFT for 3 weeks and haven't killed it yet.