1. Type: JTT 500W, JTT1000W 2. Voltage: 120v, 230v 3. Watt: 500w, 1000w 4. Base: E40/E39 5. Bulb type: T47 Product Description1. Type: JTT 500W, JTT1000W 2. Voltage: 120v, 230v 3. Watt: 500w, 1000w 4. Base: E40/E39 5. Bulb type: T47 6. Length: 215mm, 280mm 7. Case: 25PCS/CTN JTT Halogen lamp