G13 haze is a lovely strain, very strong high from it, lovely haze taste. Also check out the G-13 widow strain, there's a site that sells it think it may be Dr.Chronic.
i had some g13/haze over newyears a friend of mine grew under a 1000 watts.. It wasnt as strong as i expected.. They were pretty buds tho. The hashplant i had before that was twice as strong.