New Cold Cathode Bulbs Can Be Dimmed, SwitchedPatrick Martini February 13, 2007
Cold cathodes are the new kid of the light bulb world. Until recently, cold cathodes lights were only available for recess lighting. But what is a cold cathode? In most fluorescent bulbs, a cathode is heated to produce light, but with cold cathodes the cathode operates at the ambient room temperature. The bulbs offer several advantages: they have a very long lamp life, they're dimmable, and they can used in situations where the bulb is turned off and on frequently (even in flashing signs). The non-profit Energy Federation Incorporated, offers cold cathode bulbs that are rated at 5 watts, making them suitable replacement for 20-25 watt incandescent bulbs. They are "wet rated", meaning they can be exposed to the elements, and they are able to be used on a dimming circuit.