USUIE Clamp Light Socket, Clamp Lamp Holder for PAR38 Grow Light Heat lamp, Red Light Bulbs, e26/e27 Socket Base, High Load Bearing and High Power, Iron Carbon Alloy Gooseneck with Switch About this item 【Sturdy and Durable】Our gooseneck lamp holder is made of high-quality aluminum alloy and iron-carbon alloy, ensuring a stable structure that can support large bulbs up to 2.2lb/1kg. This makes it perfect for heavy-duty bulus use, such as with grow lights, red light bulbs, and other heavy bulbs. 【Versatile Design】With an E26/E27 base and anti-rust aluminum material, our lamp holder is not only heat-resistant but also corrosion-resistant. The ring hollow design promotes good heat dissipation, making it ideal for high-power bulbs. Plus, it's compatible with a wide range of bulbs, use it for any lighting need. 【Safe and Reliable Wiring】Our bulb holder features two 20 gauge wires with a PVC sleeve that can withstand high temperatures up to 176 ℉ (80 ℃). This ensures the wires won't burn out easily and can support bulbs up to 250W, making it perfect for heavy-duty use. 【Clamp Light Socket】Our lamp holder features a aluminum alloy industrial strength C-clip with soft rubber pads on both sides, protecting your tabletop from scratches. Plus, it can support up to 55 mm (2.2 in), making it perfect for use on various surfaces.