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Purchasing smart bulbs for the home is a little like selecting HD-DVD or Blu-ray. Like regular old incandescent, or CFL or halogen or LED bulbs, smart bulbs—which can be controlled by your phone—fit your regular old sockets. You’ll need to choose a system and stick with it if you want to have a separate phone app for each room of your home, hoping that the system stays around so you can buy replacements in future. You wish that the app you use to switch your lights on and off is renewed to work on any new phone you might buy.

Half navy warships adopt LED light, save $150 million in fuel per year. Warship replace LED bulbs can save 3% energy, whole fleet can save $150 million fuel one year. The first warships replace LED lamp in 2007, navy purchased $ 23 million LED products in 2011 , at present the LED products has been used on 126 warships.

In general situation: under the sunlight is 100000 lux. Cloudy day outside is 10000 lux. Indoor fluorescent lamp is 100 lux. 60w lamp from 60 cm desktop is 300 lux; Television studio is 1000 lux; Dusk indoor is 10 lux; Street lights at night is 0.1 LUX. Candle in the distance of 20cm is 10 ~ 15 lux.