This is kinda a response to the thread below But I really would like to find these again. I bought these ( Or was given them by a vendor) while working in a hobby shop in San Diego about 2004/ 2005, Used to fly demo's at night in the shop parking lot by scotch taping 4 to wing tips rudder and nose, they activate by pushing the colored part in to contact the internal battery and weigh just .9 gram each, pull out to turn off, they came in several colors and lasted something like 20 hours.
Does anyone know where to buy them or something similar?