The Magic Tube, which can work only with compatible ballasts, is a replacement for fluorescent T5/T8 lamps. The Magic Tube cannot work with magnetic ballasts. Designed to operate on existing ballasts with input voltage of AC120-277V, AC347V. Plastic housing and aluminum. Stable lumen output for different ballast brands with different ballast factors. THD less than 20%, Power factor more than 0.95.