electronic ballast for T5: Compact design with lead wire. Pre-heat start ensures a long switching cycle of the tubes. Without flickering and noise, but with high luminous efficiency and in compliance with EMC. The volt falls within the range of 176-250V with deactivation protection design. electronic ballast for T8: Easy installation with plastic cover and terminal block. Without flickering and noise, but with high luminous efficiency and rapid starting. The applicable volt falls within the range of 176-250v while the starting temperature fall within the range of 0? to 45?. High power factor, deactivation protection design and CCC certified. energy saving lamp: 2U, 3U,U, 4U, spiral shaped. mosquito expeller, negative ion air purifier lamp, with-cover lamp. More compact as compared to standard ELT. Fits most luminaries and especially where economical continuous lighting is needed. Up to 75% energy saving. Ten times the lamp life of a standard incandescent lamp. Excellent color rendering , excellent light distribution. Flicker free instant start. Universal burning position. lighting fixture: light source: T5 tubes or T8 tubes material: Aluminum or super-thin coated metal ABS end-caps lots of design beautiful appearance Down light beautiful appearance soft light