Oh, that's a tricky one! Tiles can be slippery and difficult to work with, so you'll need to take extra precautions. First, make sure you have the right equipment. You'll need a ladder, a nail gun, and some sturdy rope. Next, start by tying the rope to the top of the roof and securing it to something stable on the ground. Then, use the ladder to climb up to the roof. Be sure to wear shoes with good traction so you don't slip and fall. Finally, use the nail gun to attach the lights to the tiles, being careful not to damage them.