four Ballasts,four brackets and two bulbs in one sets Technical Parameter1) Power: 35W,40W,45W,50W,55W2) Lumination:2500~ 3500 lm3) Lifespan: 3000hours4) Operating ambient temperature range: -40 degree~ +105 degree5) Color temperature: 3000K-30000K6) Voltage: 12V or 24V7) Wiring: high temperature-resistant, high voltage-resistant8) Inside/outside tube : Anti-ultraviolet UV-CAT crystal quartz ...