zaltdrob from Hungary decided to go green - As a starter, he replaced the lame old lamp in his room with LEDs. The room is 21 square meters and he used 84 LEDs each one rated at 1 Watt. The total luminosity is 7560 Lux.
Check out this video in which he shows step by step how he made this LED grid. He does not go deep inside electronic staff, but everyone can make an LED driver, right?