Product Overview

Sylvania 21436 F25T8/W/ECO 25W T8 3500K Neutral White Fluorescent Lamp
The Sylvania 21436 (F25T8/W/ECO) is a 25W T8 fluorescent lamp on a Medium Bi-Pin (G13) base. Rated 3500K neutral white at 55 CRI, it delivers 1,850 initial lumens (1,330 mean).
Wattage 25W T8 | Color Temp 3500K Neutral White | Lumens 1,850 Initial | CRI 55 Color Rendering | Rated Life 20,000-30,000 Hours |
Technical Specifications
| Item Number | 21436 |
| Ordering Abbreviation | F25T8/W/ECO |
| Bulb Shape | T8 |
| Base | Medium Bi-Pin (G13) |
| Wattage | 25W |
| Nominal Length | Not listed – verify |
| MOL (Maximum Overall Length) | 47.78" |
| Color Temperature | 3500K (Neutral White) |
| CRI | 55 |
| Initial Lumens | 1,850 lm |
| Mean Lumens @ 25°C/77°F | 1,330 lm |
| Average Rated Life | 20,000 to 30,000 hours |
| Standard Package Quantity | 30 per case |
Product Overview
This Sylvania 25W T8 fluorescent lamp uses a Medium Bi-Pin (G13) base. Initial output is 1,850 lumens, dropping to 1,330 mean lumens at 25°C/77°F. This product is not covered in the Sylvania lighting catalog supplied; specifications were carried over from the previous ADL Supply listing and should be verified against the Sylvania datasheet before ordering. For ballast/lamp compatibility, refer to the Sylvania QUICKTRONIC ballast guide.
Compatible Applications
- Fixtures specified for a 25W T8 lamp with a Medium Bi-Pin base
- Direct replacement for the Sylvania 21436 (F25T8/W/ECO)
Before Ordering – Verify
- Confirm your ballast type is compatible with this lamp (see the Sylvania ballast guide)
- Confirm 3500K color temperature matches the rest of your installation
- Confirm lamp length and base type match your fixture
Safety and Handling Guidelines
- Always disconnect power before servicing or installing
- Handle by the base/end caps; avoid flexing or striking the glass tube
- Contains mercury – if broken, ventilate the area and follow EPA cleanup guidance
- Dispose of / recycle in accordance with state and local mercury-lamp regulations; recycle per lamprecycle.org
Ordering Information
- Item Number: 21436
- Ordering Abbreviation: F25T8/W/ECO
- Manufacturer Part Number: F25T8/W/ECO
- Standard Package Quantity: 30 per case
For wholesale pricing, bulk availability, or help confirming the correct replacement lamp, contact ADL Supply at 1-800-235-3489.