[KrazyKuch]

I will advise against cutting down the LED christmas light unless you plan on altering your power input with a resister.

Some of the stuff in the second paragraph is not nessasarly true or it can be true in certian situations. you cannot use any power source from 3 volts to 220 volts, nore could you use a household dimmer with out risk of blowing up all your LED's. most LEDs have a break over voltage. that means unless you have that Voltage they won't light. once they are lit they can operate down to what ever voltage specified. there are two ways to power LED's the first by limiting the current to the string to the specified amount of the LED. so say 20milliamps. this will light any number of LEDs in series up to the maximum wattage rating of your transformer. the other way is by limiting voltage ~4V for each LED. so if you have a string of 10 LEDs and you want to put 4Volt to each you need a 40V power supply. the way I run them is off a DC power supply say from a walkman or something and use a resister to set my voltage. In this situation you could have a variuable resister (which dimmer switches can be) and you can use that to "dim" the LEDs but you have to make sure the resister at its lowest setting will not sent to much voltage to the LEDs or you will burn them out (I went through 20 one day untill I realized I was reading the bars on the resister wrong )

anyways hope this clears a few things up.

Steve

Were did you get this info from.....LED's will not burn out from to much voltage!!!!! LED's will not burn out unless given more then 220 Volts but if you give them more then 16mA they will burn out faster then you could possibly think......A resistor is their more or less to restrict the amount of current going to the LED....Also on the LED XMas lights there is a resistor for every single LED.

I am a Licensed Electrician and almost have a EET Degree (Electronics Engineering Technologies Degree)