kouichi okamoto SPECIFICATIONS year : 2005 material : rubber. polypropylene . LED . lithium-coin battery (CR2032) package size : W160mm x D40mm x H250mm package weight : 60g DESCRIPTIONS This lamp is basically created with a balloon and a LED, made possible because unlike other types of bulbs, LEDs do not generate heat. LEDs are environmentally friendly because they last longer, is energy efficien