The ordinary high bay lights are made by metal halide lamps,mostly with E40 base, installed in a housing and with a electronic ballast, here is the picture of the metal halide high bay as following:
The ordinary high bay light may have different shapes,but they do have following features:
1. Have a E40 bulb
2. Have a electronic ballast in a box,it’s like the driver box of the LED high bay
3. Have reflector,maybe aluminium or acrylic
4. Should installed at a very high roof,maybe a factory,exhibition centre,stadiums,oil station…
LED high bay would have same function as traditional high bay lights,just made of LED light source,in a similar housing,but don’t have ballast inside.
Recent years LED technology grow fast,at start only the small power lighting products use LED source,because the LED source will produce a lot of heat while produce light,although the LED is called cold light source,but actually the LED indeed produce a lot heat,and the lumen effiency at the first years couldn’t be better than the traditional lighting products.After years of development,the LED chip,LED source,LED driver,cooling technology had been ready for the big power LED products,100W,200W,500W,1000W LED lighting products on sales in the market.
LED high bay normally have the power from 80W-500W,could be mounted on different hight,lumen effiency could be from 70lumens/watt-150lumens/Watt,however,few LED high bay could really reach 150lumens/Watt.normally 130lumens/Watt would be very high.
As the angle of the LED is 120 degree,sometimes we may need reflector to help reduce the angle of the whole light,60 degree,90 degree,120 degree would be the mostly common angle reflectors.