Fluorescent Tube · 18W T8 26 in Cool White 4100K G13 medium bi-pin - Satco S26514

What this product is for

This 18W T8 fluorescent tube is used as a replacement lamp in compatible linear fluorescent fixtures that require a 26 in nominal lamp length. It provides cool white 4100K light for utility, commercial, and task-oriented spaces.

Use for

Use for maintenance replacement in existing fixtures with a G13 medium bi-pin socket and preheat ballast. Commonly used where a crisp neutral-cool light is preferred, including back-of-house areas, work areas, display lighting, and older specialty fixtures that take a 26 in tube.

Avoid for

Avoid for LED-only fixtures, instant-start applications not matched to the lamp requirements, or any fixture that does not specifically use a 26 in T8 fluorescent lamp. Do not assume standard 24 in or 18 in tubes are interchangeable with this format.

Best for

Best for electricians and maintenance teams replacing an exact lamp type in existing fluorescent installations where fixture compatibility matters more than broad retrofit flexibility.

Installed in

Installed in compatible linear fluorescent fixtures with G13 medium bi-pin lampholders. Nominal length is 26 in, with an overall length of approximately 25.22 in (641 mm) and diameter of approximately 1.04 in (26 mm).

Why this product exists

This lamp supports legacy fluorescent fixtures that still require a specific 26 in T8 replacement. It helps keep existing equipment operating without changing the fixture, ballast, or lampholders.

Compared with similar products

Compared with more common linear fluorescent lamps, this 26 in format is more application-specific, so matching lamp code and base is important before ordering. With 1220 lumens and a 4100K cool white colour, it is suited to general commercial lighting rather than warm residential ambience. Typical guidance: 4100K lamps are commonly used where clearer visual contrast is preferred. Actual lighting results depend on fixture condition, ballast performance, and installation environment.

Specifications

• Lamp type: T8 linear fluorescent
• Wattage: 18W
• Nominal length: 26 in
• Overall length: approximately 25.22 in (641 mm)
• Diameter: approximately 1.04 in (26 mm)
• Colour temperature: 4100K cool white
• Light output: 1220 lumens
• CRI: 60+
• Base: G13 medium bi-pin
• Dimmable: No
• Rated life: 7,500 hours
• Beam angle: 360 deg
• Operating position: Universal
• Ballast requirement: For use with preheat ballast
• Operating frequency: 50/60 Hz
• Mercury content: 7.9 mg
• Warranty: 3 years