|IKEA's Sunnan($20) is a LED work lamp, entirely powered by solar power, Cool and green! It features can be used for four hours on on a full charge, and can be recharged in 9-12 hours on a sunny day, but over 12 hours on a cloudy day(depending on the weather). When the solar panel is fully charged the light intensity is 400 to 500 lux at its starting point. After 3 to 4 hours the light intensity has lowered to about 300 lux. It is available in five colors: green, blue, red, orange and yellow.