User blog comment:Pacifista15/Lightspeed/@comment-3075024-20120113181856/@comment-3119203-20120113182655

The light attacks focus light, much like a magnifying glass used to roast a bug. The heat is capable of sawing through things, apparently.

As for the bucket....place it upside down on the ground, and make sure no water can out the bottom. Poke a hole in the bottom of the bucket, and fill the bucket with water from there. If you want to patch up the hole, duct tape is a cheap and easy-to-find solution.