Sylvania
Sylvania 21115 CF26DD/841/ECO 26W 4100K Compact Fluorescent Lamp (10-Pack)
26W1.59999999865825 lb
A 26W double-tube CFL delivering 4100K cool white at 82 CRI — reliable, efficient workhorse lighting in a 10-pack.
$33.99*
View on Amazon
✓ In Stock on Amazon.com
*Price sourced from Amazon.com. Last updated:Aug 29, 2026.Price and availability are subject to change — details.
Affiliate Disclosure: As an Amazon Associate, Studio Supplies earns from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.
Notice a mistake? Let Us Know
Overview
Key Features
EFFICIENT LIGHT YOU CAN COUNT ON: This 26W 2-pin compact fluorescent bulb replaces an incandescent with comparable output at a fraction of the energy. Plug-in G24d-3 base, magnetic ballast compatible. Same great light, far lower running costs.
CRISP, HIGH-QUALITY LIGHT WITH 82 CRI: Rare earth phosphors deliver accurate, natural-looking color in a cool white 4100K tone. High CRI means colors and surfaces look true - great for retail, task, and accent lighting where light quality matters.
10,000 HOUR LIFE CUTS RELAMPING COSTS: Lasts up to 13 times longer than a standard incandescent bulb. With 85% mean lumen maintenance throughout its life, brightness stays consistent - ideal for hard-to-reach fixtures in commercial installs.
UP TO 75% ENERGY SAVINGS VS. INCANDESCENT: At just 26W, this compact fluorescent light bulb uses about a third of the energy of a comparable incandescent - reducing electricity costs without sacrificing light output.
VERSATILE CFL BULB FOR COMMERCIAL & RESIDENTIAL USE: Perfect for recessed downlights, wall sconces, task lighting, exit signs, and showcase lighting. Designed for energy-saving fixtures and retrofits where compact size and reliable output matter.
Specifications
Brand
Sylvania
Model
21115
Wattage
26W
Color Temperature
4100K (Cool White)
CRI
82
Lamp Type
Double Tube Compact Fluorescent
Base Type
2-Pin (GX24d-3)
ECOLOGIC
Yes (TCLP Compliant)
Pack Quantity
10
Country of Origin
United States
Frequently Asked Questions
What color temperature and color accuracy does this lamp produce?
4100K places this lamp squarely in the cool white range — neutral with a slight cool bias, comparable to daylight-balanced fluorescent office lighting. The 82 CRI is adequate for general commercial and task lighting but falls below the 90+ CRI threshold preferred for color-critical work like photography or video.
What ballast type does this lamp require?
The CF26DD uses a 2-pin (GX24d-3) base, which means it's designed for use with a magnetic ballast. It will not work with electronic ballasts designed for 4-pin compact fluorescent lamps — verify your fixture's pin configuration before purchasing.
How does the 26W power draw compare to LED equivalents?
A 26W CFL in this configuration typically produces around 1,700-1,800 lumens. A comparable LED plug-in replacement would deliver similar output at roughly 10-12W. If you're replacing multiple lamps, the energy savings from switching to LED equivalents are significant.
Is this lamp dimmable?
No. Two-pin compact fluorescent lamps operating on magnetic ballasts do not support dimming. If you need adjustable output levels, you would need to switch to a dimmable LED replacement or a fixture with a dimmable electronic ballast and compatible 4-pin lamp.
What does TCLP compliant and ECOLOGIC mean for disposal?
TCLP (Toxicity Characteristic Leaching Procedure) compliance means this lamp passes EPA testing for reduced mercury content, so it can be disposed of in standard waste streams in most jurisdictions. However, recycling is still recommended as best practice for any fluorescent lamp containing mercury.
Related Products
