Ted do you mean florescent fixture ballast or CFL.
CFL is the designation for compact florescent light bulb.
Any standard screw in in light fixture will take them and my ceramic ones were very inexpensive.
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Both/Either of them. I got the feeling from the first post that expense was a factor. You know, that it's a case of "Watts per Dollar".
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My neighbor is going to kill someone one of these days.
He buried 12 AWG THN directly in the ground no conduit about 4 inches deep 120 VAC in the flower beds.
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Worth, I think I'd try to get myself on his beneficiary list. I had a neighbor in New Hampshire who did the same thing to put lights in his flower beds. He lost two pets and almost his wife.
The conduit might not be enough of a difference if it isn't sealed at all ends.
Burying wire is more critical than most folks think. Here in this part of Tennessee, there's a little green grub worm that will eat the insulation off any wires it runs into. Ran into it back in the mid 80's and was rudely reminded last year with a repeat for my nephew.
Ron, if you're still reading with us, let us know if we've been any help.