The Norman Lamps 100-200-300/3WY is a PS25 incandescent light bulb designed for three-way mogul base floor lamps and torchiere-style fixtures. Built as an NLI-USA exclusive, this incandescent bulb operates on standard 120V current and delivers three selectable wattage levels of 100W, 200W, and 300W through a specially engineered dual-filament design, allowing users to switch between low, medium, and full-brightness settings with any compatible three-way socket and switch.

The PS25 lamp shape features a large pear-style glass envelope measuring 6.30 inches in overall length and 3.10 inches in overall diameter, providing the generous surface area needed to safely manage the heat output of a high-wattage incandescent source. The frosted glass finish diffuses the light evenly across a full 360-degree viewing angle, reducing glare and producing smooth, uniform illumination suited to reading, task work, and ambient lighting in large rooms.

This incandescent bulb is fitted with an E39d brass mogul screw base, the larger-diameter base standard used for high-wattage lamps that require a more robust electrical connection. The mogul base is compatible with three-way mogul sockets found in many full-size floor lamps and specialty fixtures. The bulb is rated for 1,500 average life hours and is dimmable, offering additional flexibility for fixtures with compatible dimming controls.

Available in a case quantity of 12, this PS25 incandescent bulb is well suited for residential torchiere and floor lamp applications, commercial spaces requiring adjustable high-output incandescent lighting, and specialty environments where the traditional incandescent light quality and three-way functionality are required.

• 3-Way Incandescent PS25 bulb with selectable 100W, 200W, and 300W settings via a special dual-filament design for low, medium, and high brightness
• E39d brass mogul screw base fits three-way mogul sockets in full-size floor lamps and torchiere-style fixtures — requires a 3-way socket and switch
• Frosted glass envelope delivers 360-degree diffused illumination, reducing glare for smooth, even light distribution across large spaces
• PS25 lamp shape measures 6.30 in. overall length and 3.10 in. overall diameter; rated 120V with 1,500 average life hours
• Dimmable and compatible with standard three-way switching; available in a full case of 12 units

Tags: 100w-200w-300w 3 way mogul base 3-way frosted incandescent