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. 

Unfortunately, a partial power outage without a tripped breaker often means you have a major wiring issue or that the breaker itself is going bad. When the power is out in one room but the breaker is not tripped, you need to call an electrician as soon as possible to identify the cause of the problem and repair it.

Yes, tamper-resistant outlets are a safe and effective way to protect children from electrical hazards. They feature a spring-loaded shutter that blocks the outlet slots when not in use, preventing a child from inserting foreign objects. While they are the safest option available, it's important to note that few things can be considered truly 'childproof.' Children may still try to imitate adults by inserting a plug, so constant supervision around any electrical device is recommended. Tamper-resistant outlets are a much safer solution than childproofing covers, which can be removed by children and may pose a choking hazard.

First, check the current electrical code in your area to ensure spaces you’re considering meet the requirements. After that, your outlet’s location is up to you. If you’re moving it to hide wiring, you may want to move it in a spot that will also be hidden from view, such as behind a media center or table. As long as you meet the spacing guidelines set by electrical codes, you should be able to pick any spot in your home for an outlet.