Notable is, Panasonic, Toshiba (Toshiba), Hitachi (Hitachi), mitsubishi electric, osram, philips, wonderful (MitsubishiOsram) ball steep light such as solar energy companies are actively into the traditional tungsten filament lamp and halogen lamps, and to achieve more uniform light source, giant deployment is as high as 300 degrees Angle A19 tungsten product line strategy have become more common.