They are programmed (using the charge controller) to turn on when it is dark - around 7.30pm and turn off after 3 hours - around 10.30pm.
Each set consists of a 30W mono-crystalline panel, a 10A solar charge controller, a 2nd hand car battery and a 1 meter LED strip.
The one at the balcony is also powering the solar fan occasionally. The LED lights in the balcony will shine into my living room, so eliminating the need to switch on my living room lights while we are watching the TV.
The one at the common toilet also lights up most part of the kitchen so we don't have to switch on the lights when we go into the kitchen to wash our cups, clothing, etc.
My wife and I are quite happy with the LED lighting as it brings us lots of conveniences.
I managed to keep the cost down (less than $100 per set) by using 2nd hand car battery from scrap yard.
Actually, I can simply use 1 set of this system to light up 2 places, but the wire will be very long and unsightly.
