From these stylish lamps made from used PPE milk bottles and LED lights, you can see what recycled materials can do. And just with some circuitry knowledge, you can also make your own LED milk bottle lights which are totally green and energy-saving: the LEDs apparently dissipate less than 3 watts but are bright enough to see by. The lamps are controlled via an Arduino, which allows for lots of customization with sequencing and dimming. The complete instructions are available at Instructables.