Energy cost and green energy sources are a big concern. One thing we are trying to do at home is reduce the cost by using more energy efficient lighting. LED lights such as the cree xm-l are one thing we have checked on. Whether we want to use it to light indoors, outside for security lights we can have energy efficient lighting. There are even sun powered LEDs that are available. My girls need bright lights to study and I like bright light when I read. I do not really care for fluorescent lights, they do not seem to give me the lighting I prefer. LED for me may be the way to go.