E27 25w/40w/60w/75w/100w COLOR SHOCKPROOF INCANDESCENT LIGHT BULB

1).Type:A19/A55/A60/A70/A75/PS100/PS110/T60 incandescent lamp
2).Voltage:110v-130v/220v-240v incandescent light bulb
3).Wattage:25w/40W/60W/75W/100W/150W/200W/300W/500W incandescent bulbs 
4).Model number: clear/frosted/soft white/color light bulb
5).Base:Iron/alum./copper for choosing in E14/E27/E40/B22 incandescent light
6).Diameter:55mm/60mm/70mm/75mm/100mm/110mm
7).Lifetime:1200Hours,soft light
8).CE/ROHS/CCC/TUV/SONCAP/SASO/ROHS Approved.
9).Package:1pc/color box ,10pcs/shrink,100pcs/carton,color box also can be customization.
10).Material of base:Aluminum/iron/copper.
11).Shape:A55/A60/A70/A75/G40/G45/C35/R80
                            INCANDESCENT LIGHT-EMITTING PRINCIPLE

  Common incandescent lamp is mainly composed of filament, wires, lamp holder and glass shell, column, etc. In simple terms, incandescent lamp is through the power of the filament after heated to incandescence state, with visible light from a thermal radiation light source. The main point is the filament incandescent light bulb and filament is commonly tungsten wire, tungsten wire is if you meet the oxygen oxidizing reaction, then it will be when the tungsten filament temperature as high as 2000 degrees after the power supply will be the tungsten filament burn out, and reaction generated a yellowish-white tungsten trioxide, just attached to the glass shells, on the wall so we common incandescent light bulbs will be black and it is for this reason.