The DIALIGHT part 521-9054 is a high-quality Lamp, Neon with the NE-51H bulb type, designed with a T3-1/4 Miniature Bayonet Base for easy installation. This lamp is optimized for use with power sources ranging from 110-125Vac/Vdc, and can be easily adapted for use with 220-250Vac/Vdc by adding a 150K 1/2W resistor. Ideal for various applications requiring reliable neon lighting solutions.