To hang Christmas lights on a ceiling without using nails or traditional hooks, you have several damage-free options. Adhesive hooks and clips are a popular choice. For smaller projects, you can use pushpins, tacks, or adhesive putty. Specially designed transparent tape that can hold weight without damaging paint is also effective. For a more creative approach, consider stringing the lights over a curtain rod near the ceiling. If you have a drop ceiling, look for clips and hooks designed to attach to the metal framing. Note that staples can also be used, but may leave small holes.

It’s not a good idea to mix LED and incandescent Christmas lights if you can avoid it. LEDs and incandescents can have significantly different electrical current needs. This difference can lead to a higher risk of problems and failure for both light strands. When possible, switch all your lights over to one kind or the other for the best results. Do not connect the different types of light strings to each other, and avoid linking them to the same circuit. 

Yes, you must use an extension cord specifically rated for outdoor use to power outdoor lights, such as Christmas lights. Extension cords intended for indoor use lack the protective properties to withstand exposure to outdoor elements. To safely hang and power lights outside your house or in your yard, always connect them to an outdoor power source using an outdoor-rated extension cord.

If you are hosting a large party this year or have staged your home for potential buyers, having a professionally-decorated tree can make a big impact. Christmas tree decorating services can also be more than worth it if you're unable to reach the top of your tree and need assistance with precarious ladder work.