For general onboard lighting, in areas such as cabins and cockpits, it's important to note that existing controls such as dimmers may not be compatible with your new LEDs. Many boaters prefer to be able to precisely control the amount of light in an area, particularly cockpits and wheelhouses where its important to preserve your eyes' natural acclimation to darkness. A basic LED replacement lamp will likely not work with traditional dimmer switches, so if you desire to use one, you must purchase LED lamps designed for dimming. LEDs require a precise voltage reklam skylt to operate properly and contain electronics which monitor and adjust the incoming voltage to maintain it at the correct levels. Dimmer switches interfere with the operation of these electronics in LEDs not designed for dimming, causing flickering, erratic operation, and shortened LED life. LEDs designed for dimmable operation are "programmed" to allow for the changes in voltages a dimmer creates, allowing the LED to produce steady light output as the voltage is reduced. In short, you cannot simply connect any LED bulb or lamp to a dimmer switch and must use LEDs specifically designed for use with dimmers.