http://www.netvouz.com/lovelylovely/tag/red_led_flashlights?feed=rss lovelylovely's bookmarks tagged "red_led_flashlights" on Netvouz http://youtu.be/hiLpif2FV6U How does red light actually help in astronomy? Well, to answer this question, you have to know that there are two types of nerve receptors in our eyes: cones and rods. Cones are active during the daylight, and they enable us to see all those lively colors. lovelylovely Sun, 17 Mar 2013 11:57:00 GMT