I run LED lights that are sensor and battery operated. It's great for the head where switches are a pain. Mounted in storage areas where it lights up automatic. They are cheap at cosco and last a long time on one set of batts. I store plenty of batteries for them though just in case. I leave the old lights in place but rarely use without timed switch. For the intense searches I use my St. Minimus head lamp which does not go out when bumped on the head and has no batt pack on the back of the head. Since it's not water proof I keep a flash light that is. The LED is best going on and off so it does not heat and the new generation exhibits better durability so don't go by the old ones. When dealing with nav lights / lawyers and courtrooms it's better to go by the CG book. If you can't, get out the red, white or green back ups that take far less juice.