Sylvania 20673 CF26DD 26W 3500K Double Tube CFL - Energy Saving

In this review of the Sylvania 20673 CF26DD 26W double tube compact fluorescent lamp, the bottom line is straightforward: this lamp is for people who need reliable, energy-saving general illumination in fixtures that accept a G24q-3 4-pin base. The review finds its strongest selling point is long life combined with good color balance; at 3500K and 82 CRI it produces neutral white light suitable for work areas and common spaces while offering the energy savings and longevity expected from compact fluorescents. The 12,000 hour life and 1710 lumens output make it a practical replacement for higher-wattage incandescent sources in compatible drivers.

Key Features

• Consistent neutral white: The 3500K color temperature provides a balanced, slightly warm white that suits both task and general ambient lighting without appearing too cool.
• High light output: At 1710 lumens the lamp delivers ample brightness for small to medium rooms or commercial fixtures that need dependable ambient light.
• Long life: Rated for 12,000 hours, this lamp reduces replacement frequency and maintenance in hard-to-reach fixtures.
• Compatibility: The G24q-3 4-pin base works with many electronic and dimming ballasts, giving flexibility for retrofit projects where a compatible ballast is installed.
• Energy saving alternative: At 26 watts it uses far less power than comparable incandescent options while still producing strong lumen output.
• Environmental compliance: ECOLOGIC designation indicates improved handling with other SYLVANIA ECOLOGIC lamps to meet TCLP requirements in installations.

Who It's For

This lamp is well suited to facility managers, small business owners, and homeowners who have fixtures that accept a G24q-3 4-pin compact fluorescent and want a neutral 3500K light that is both bright and long lasting. It also fits retrofit projects where reduced energy usage and fewer bulb changes matter.

It is not for people who require LED-specific benefits such as instant full brightness in cold environments or the highest possible energy efficiency; those shoppers should look at LED equivalents. Also avoid this lamp if your fixture lacks a compatible electronic or dimming ballast or if you need a different color temperature.

Pros & Cons

Pros

• Good balance of brightness and efficiency with 1710 lumens from 26 watts.
• Long rated life of 12,000 hours cuts maintenance and replacement frequency.
• 3500K and 82 CRI make colors appear natural for most indoor tasks.
• ECOLOGIC compliance helps with installations aiming for TCLP compatibility when paired with linear ECOLOGIC lamps.

Cons

• Requires a G24q-3 4-pin compatible ballast, so it is not a direct fit for all fixtures.
• As a CFL, it lacks some modern LED advantages such as instant cold-start performance and the highest energy efficiency.

Specifications

Our Verdict

The Sylvania 20673 CF26DD is a practical, value-focused compact fluorescent for anyone with fixtures that accept a G24q-3 base and who wants neutral, long-lasting light without frequent replacements. It delivers strong lumen output at modest wattage and is best chosen when compatibility with electronic or dimming ballasts exists; those seeking the utmost in efficiency or instant cold performance may prefer LED alternatives.

Frequently Asked Questions

Will this lamp work with a dimmer?
Yes, the lamp is designed for use with compatible dimming ballasts, but confirm your ballast supports CFL dimming.

Is the light warm or cool?
The lamp produces a neutral white at 3500K, slightly warmer than daylight but cooler than standard warm white bulbs.

How long will the lamp typically last?
It has a rated life of about 12,000 hours under normal operating conditions.