Okay, did some investigating. On that 15 amp circuit, there are the
three light sockets (on two switches if that helps), two outlets, and
one garage door opener (6.5 amps).
The 8 foot lamps are 110 w each (times 8 if I were to install four
fixtures), and the ballasts are 120 v, 60 Hz, with 2.14 amps line
current. No special mounting instructions
I'm guessing this means I might not use my opener with four of these
fixtures turned on.. or perhaps just barely, and would have to use an
outlet from another circuit for certain power tools.