Widow And Arjan Question.

Check it. I have 2 widows and 2 arjans bout to be done flowering. only thing is, I wanna go an extra 2 weeks on the widow with lights at 8hrs to get more resin production (this is possible, ive done my research) my only question is, the arjans arent nearly done enough for me yet. I guess my real question is can I cut the light to 8hrs for them both, or would it hurt the arjan?

All comments are welcome a long as your not a dick and have something constructive to say. Thanks.