4100 Kelvin Light Bulbs | McMaster-Carr

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118 Products

About Brightness and Light Appearance

Find the right lumen level to brighten your space. Then, compare the way warm, neutral, and cool lighting affect the appearance of everyday objects.

About Replacing Tubular Fluorescent Light Bulbs

Screw-In Base Light Bulbs

Use these bulbs in standard sockets, panels, and appliances.

Screw-In Base Floodlight Bulbs

Bi-Pin Base Tubular Light Bulbs

Recessed Double-Contact Base Tubular Light Bulbs

Replace existing fluorescent light bulbs that have recessed contacts or upgrade them to LED.

Single-Pin Base Tubular Light Bulbs

Swap new fluorescent light bulbs into your single-pin base fixture, or upgrade them to LED.

U-Shaped Tubular Light Bulbs

Replace the U-shaped fluorescent bulbs in your fixture or upgrade to LED. These bulbs are often used in 2'×2' ceiling lights.

O-Shaped Tubular Light Bulbs

Swap new circular CFL bulbs into your fixture or upgrade to LED. These bulbs are often used in illuminated workstation magnifiers.

Socket Base Vehicle Headlamp Light Bulbs

Two-Pin Wedge Base Plug-In Compact Light Bulbs

Often used in task lights, these two-pin wedge base bulbs are comparable to PL, Dulux, and Biax bulbs.

Four-Pin Base Plug-In Compact Light Bulbs

Energy efficient and long lasting, these four-pin bulbs are often used in task lights. They’re comparable to PL, Dulux, and Biax bulbs.

Four-Pin Wedge Base Plug-In Compact Light Bulbs

Often used in task lights, these four-pin wedge base bulbs are comparable to PL, Dulux, and Biax bulbs.