The red light masks always scared me 🫣 LED = synthetic blue light spectrum 🧊 Incandescent = natural color spectrum 🌞 •The first LED was introduced in 60s as low intensity red light. It wasn’t until the 90s that white LED bulbs became available for general lighting. The LED trend didn’t take off until the 2000s. •A study published in the 2010 journal of Environmental Science & Technology found that LEDs contain lead, arsenic and a dozen other potentially dangerous substances. •We know how blue

#TodayInHistory: January 27, 1880, napagkalooban ng U.S. Patent ang electric lamp o mas kilala bilang incandescent light bulb na na-develop ni Thomas Edison. Ang incandescent light bulb ay isa sa pinakapopular niyang invention dahil ito ang naging daan para sa universal domestic use ng electric light. | Good Morning Kuya

Did you know? The light bulb was invented 50 years prior to the 'invention' by Thomas Edison. Edison created the first commercially practical incandescent light bulb, receiving a patent for this on 27 Jan, 1880. #DiscoveryChannel #DiscoveryChannelIndia #thomasedison | Discovery Channel India