Lighting Products and Fixtures Design True Fila Bulb by Hangzhou Hangke Optoelectronics Co.,Ltd. True Fila is a bendable LED filament light bulb designed for indoor lighting. The flexible filament can be shaped into many forms, so the lamp suits a wide range of lighting settings. The filament is made of a modified flexible printed circuit base film and is enclosed in a glass bulb. A miniature LED process keeps the filament width at no more than 0.6 millimetres, which gives a slim appearance. The phosphor mix was refined to obtain a sunlight-like spectrum with a colour rendering value above 98. The form recalls traditional tungsten lamps.