In quick search I found You Tube video showing similar device I use in my vehicles. I’ve got a rechargeable flashlight, and mobile phone/dashboard camera and coolerbox that sometimes need to be plugged in at the same time. This helps http://www.youtube.com/watch?v=GzD9CXkDl4k

I’ve started changing my bulbs to Led
Advantages of LED lights – from sustainable.co.za website
LED light bulbs are energy efficient – producing more light per watt than incandescent bulbs which results in cheaper LED lighting costs when compared to regular lighting
LED light bulbs last longer than incandescent bulbs. Normal light bulbs have an average life span of 1,000 hours but an LED bulb has a life span of between 40,000 and 60,000 hours.
LED lights are more durable and robust than conventional light bulbs, they can also be made significantly smaller than conventional bulbs and can be used in flashlights and other small devices
LED lighting operates at a lower temperature than incandescent light bulbs, less energy is wasted in heat production and subsequent heat loss
LED lights don’t contain the toxins found in incandescent or fluorescent bulbs, such as mercury

And then I am hoping to track down these security lights http://www.youtube.com/watch?v=UAwUwKWuYQc