I recently bought this: http://smile.amazon.com/gp/product/B00II1MN5I and am planning on using it for under cabinet lighting in the kitchen.
Power adapter: Model: TNS-1220 Input: 100-240V AC, 50/60Hz Output: 12V DC, 2000mA
I want to keep it plugged in all the time and control it via some sort of switch/button to turn off/on. If the power adapter is always plugged in, would it consume electricity (it has an LED that lights up when plugged in). If so, would it be negligible?
Basically I want to know if I should:
[outlet] -> [power adapter] -> [control switch] -> [LEDs]
[outlet] -> [control switch] -> [power adapter] -> [LEDs]