Specifications: 1) Watt: 20W/30W/40W 2) Bulb type: T9 3) Base: G13 4) Color temperature: 6500K/4200K/2700K 5) Can radiate daylight, cool white, and warm white to create different atmosphere 6) Used for general lighting and are recommended for offices, factories, hospitals 7) CE and ISO9001 approved