Red cellophane is good.
You can obtain a red LED from Radio Shack for $2.69. It has a 3000 mcd output so is sufficient for map reading. Take an old flashlight bulb or a new one if that is all you have and carefully break the glass bulb from it. If you are careful you can solder the LEDs terminals directly to the already existing lead wires that went to the filament. If they break off you will need to remove the insulating material to insert the LED leads directly. Some experience soldering is required. After soldering carefully press the LED to the wired base. Gluing the LED to the base is not necessary, but you can if you wish. The LED increases the battery life. This is an economical alternative to purchasing a high priced LED flashlight.
![Big Smile [:D]](/ASY/CS/emoticons/icon_smile_big.gif)
![Big Smile [:D]](/ASY/CS/emoticons/icon_smile_big.gif)
(be sure to observe polarity. identify the leads on the LED. the shorter of the two is the cathode. cathode goes to the negative terminal of the base and the anode goes to the tip of the base-the positive connection.)
Another simple option is to paint the existing bulb with red finger nail polish.