I would run 4- #6awg thhn wires (2-blk, 1-wht, 1-grn) in a 1" schedule 40 PVC gray conduit. Do not exceed 360deg in bends atleast 18" deep. Install it on a 60amp breaker in your existing main panel. Use the same mfg breaker as your existing panel. Mount a 12/24 outdoor main lug subpanel. Any conduit above ground may have to be schedule 80. You should be able to run sealtight (gray liquid-tite flex) to your motors. Try not to run the sealtight over six feet. If you do not want to spend the money on a GFI breaker for the light mount a outdoor box underneath the panel with a GFI in it and run conduit to your light from there.
John..