In the user manual, you'll find a variety of user/installation instructions, including voltage requirements. Reading the user manual will also give you the dimensions of the hole you'll need to cut in which to place your lights. Installing beautiful recessed lighting may be all the rage, but if your circuit is overloaded, what use will they be for you? If you are taking out old fixtures and installing new ones, you can safely add lights that draw as much amperage (or less) as the previous ones. If you want to add more, consult an electrician. For example, if you had 6 fixtures, each with 100 watt lights, your circuit can hold at least 600 watts before hitting capacity. It is a good idea to lock the circuit breaker panel while you work so that no one else can turn on the circuit. Never work with circuits that are energized. Use the manufacturer's template or make your own by cutting out a circle of paper. Place the template against the ceiling in the desired location and trace around it with a pencil, marking the center point as well. If you want to place your lights according to a straight pattern or in a straight line, consider buying or renting a laser level. This will allow you to plot out the holes for the recessed lighting extremely straight. There's nothing wrong with looking more professional. Use a stud sensor or other type of structure sensing device to locate any possible obstacles in the area where you're planning to install.  If you have an attic or crawl space directly above the light fixtures, start by drilling a 1/4 inch (~6 mm) hole through the ceiling at the center point of each circle. Next, go into the attic and visually check for obstructions around each hole; you will need the light fixture to fit between the ceiling joists. If a finished area is above the ceiling, you can check for obstructions with a wire coat hanger. Bend a length of the coat hanger at 90 degrees about 3 inches (~8 cm) in. Insert the bent wire into each hole you drilled, rotating the bent portion around to check for obstructions. If the wire hits a joist, relocate your lighting fixtures accordingly.
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One-sentence summary -- Read the installation instructions. If possible, consult an electrician to determine how much voltage your circuit can reliably carry. Shut off the power before beginning any work. Mark out the location of each light. Check for obstructions in the ceiling.

Article: Your friend may or may not be aware that he or she is insecure. Let your friend know that you have noticed. This can encourage your friend to open up to you and share their feelings.  You may say, “Hey, I noticed you were really hard on yourself when you got your report card back. Are you alright?” or “You seemed upset when we were shopping for clothes the other day. Is everything okay?” If your friend is not aware of their insecurity, this may bring it to their attention. When your friend is talking, you may feel the urge to give advice, offer a solution, or judge. Because your friend is insecure, it may be difficult for them to share their feelings. You want your friend to feel comfortable speaking to you and know that you are not going to criticize.  Make eye contact and give your friend your full attention. Don't look through your phone or do anything else that will distract you. Use neutral statements and nodding to show you are listening. Try saying things like, “uh-huh,” “yes,” and “I see” to demonstrate that you are paying attention. You can also nod your head as you listen. Try asking questions to show that you are listening and clarify what your friend means. For example, you might say something like, “So you're saying that you don't like to eat around other people because it makes you feel like they are judging you?”  Being a good listener also tells your friend that you value their opinions and feelings and that they are important to you. You don't need to solve your friend's problems. You're offering a lot of help just by listening. Instead of telling your friend your opinion, ask if there is anything you can do to help. Are you willing to look up information on the internet for your friend? Can you help your friend pick out some new clothes or explore a new hobby?  For example, if your friend says that he or she is severely depressed, then you might offer to help your friend find a counselor. You may say, “I noticed that you ___. I want to help you. Is there anything that I can do?”
Question: What is a summary of what this article is about?
Discuss the subject. Listen to your friend. Ask how you can help.