... bulb: Name CCFL fluorescent spiral bulb Model NO.NBD18WSCT(D)O Optional Voltage AC110V 50Hz- ... power in AC 100v or AC230v 4.No UV,no flick and noise,soft light,totally eye ... span up to 50,000 hours,IC control ballast, no tungsten filaments7. fluorescent bulb with Excellent visual ... , teaching room (can switch with the interlligant network control and brightness adjustment used) etc.. D. fluorescent bulb ...