Bulbs

• Choose a bulb that suits the environment you have and the effect you are trying to create. A heavier duty strand of lights isn't going to quit working if one bulb goes out on you, and they often are larger than lighter duty bulb types. However, heavy duty lights (C7 and C9) tend to hog more energy.
  
  If you want to save a little money and want a more delicate look to your lighting, then opt for lighter duty lights, which are smaller and cost less to operate. LED lights are probably the most economical lights you can buy--they require only 10 percent of the energy of traditional lights to run and project for a longer distance. LEDs are available in just as many styles and colors as traditional lights, as well.
  
  

Strands

• You might think that longer strands mean less work because you can go a longer distance without having to connect electrically, but in reality, longer strands are more problematic if a bulb breaks or falls out. If this happens, you'll have a much longer strand to examine to find the problem spot as some strands are constructed so if one light goes out they all go out.
  
  Stick to shorter strands that have both female and male electrical connections, and try to limit the number of extension cords you use. Measure the area you want to light before you buy and install the lights, and always figure in a few more feet than you think you'll need to allow the lights to come back down from their securing points. Test all strands, even new ones, before getting to work.
  
  

Installation

• Nails and staples hold the lights securely, but they can damage the insulation of the lighting wiring and cause electrical problems and hazards. Instead, use plastic lighting clips. These are clips designed to work with the eaves and trim around your house without damaging it--the lights slip right into a clip or hook mechanism on the clip fixture, and they won't rust in the wet snow. Put these about a foot apart to make sure that there is enough support for the strand.
  
  When you position the lights, start near an electrical outlet that you will use. If you need to get up on a ladder, see if you can use a wood one rather than a metal one, since metal can be very slippery when wet, and wear rubber soled shoes for traction. Lean the ladder on the side of the house if needed rather than the gutters. Make sure the ladder is sitting level on the ground, and don't work alone in case you fall.