The Powermaster Lampholder T2 100W is designed to accommodate tubular-shaped bulbs with a diameter of 7mm. It is rated to handle bulbs with a maximum wattage of 100 watts. This lampholder is switched, featuring a built-in switch that allows you to turn the light on or off without a separate wall switch or dimmer. The switch is typically located on the side or top of the lampholder and can be operated by twisting or pressing it. It is suitable for use in various lighting applications, including table lamps, floor lamps, and other fixtures that require a T2 bulb. The lampholder provides a secure and stable connection between the bulb and the power source, and is typically made from a durable and heat-resistant material such as ceramic or thermoplastic.