This Ushio ESS Lamp (250W / 120V) is a tungsten halogen bulb which is compatible with fixtures that have a BA15d base and a 250W rating. It has a color temperature of 3,000K and an average life of 2,000 hours.
The Ushio ESR Lamp (100W/120V) is a halogen low voltage bulb. It has a color temperature of 2850K and an average life of 750 hours. It is suitable for fixtures with a Double Contact Bayonet Base - BA15d, and a rating of 100W.
The Ushio ETC Lamp (150W/120V) is a halogen low voltage bulb. It has a color temperature of 2900K and an average life of 2000 hours. It is suitable for fixtures with a Double Contact Bayonet Base - BA15d, and a rating of 150W.
The FCM Lamp (1000W, 120V) is a clear, 1000W double-ended tungsten halogen bulb. Note: Will fit, but not recommended for continuous use in a Lowel Tota Light fixture.