When should I lolipop my plants?

When is the best time to lolipop my WWF. before the switch or after the stretch when light is switched to 12/12?

I do a heavy pruning 1 week prior to light switch any limbs or leaves in bottom 10-12" of plant which I know will never reach canopy or high enough to get best use of light. After switch I prune 1 more time applying same rule after first week


Thank’s for the info.