Re: GFCI Height req.
I just came back from a trip to California, and at the Irvine Spectrum they have hundreds of palm trees lite up. They used sealtite and Bell boxes/GFCI protected. The boxes were from 8 to 12 inches above grade. I took pictures, in New York we don't have too many live palm trees. Also the method of fastening the lights to the trees was interesting. Maybe I will submit some of the pictures to Bill if he wants them.
Pierre