How much ballast does the LED 15W lamp belt need?
The LED lamp does not need ballast, high power LED is driven by power, it is generally divided according to power 1W, 3W, 5W, 6W, 9W, 12W, 15W, 18W, these are the days of lanterns wall lamp, 25W, 30W, which is the general Garden lights 60W, 80W, 120W these are used in the street lamp the LED flashlight; like we often use is not driving power, directly connected to the battery or the battery...
15W light belt, the ratio of 15W-20W constant current switching power supply on it
The key is the light effect of LED. Light effect LED beads are currently available from 40LM/W~100LM/W, see what you buy. Incandescent light effect is about 10LM/W, LED whole lamp, if it is cheap Zhongshan goods, it is estimated that 30-40LM/W, okay, you can go to the 60-70LM/W, PHILPS light Expo in the sample displayed, you can go to 90LM...The LED lamp uses a constant current source, not a ballast, and the output power of the constant current source should be greater than 100W, and the specific value depends on the setting
