Product Overview
Philips 27328-4 F20T12/D/ALTO — 20W T12 Daylight Fluorescent Lamp | 6500K | 960 Lumens | Medium Bipin (requires starter)
The Philips 27328-4 F20T12/D/ALTO is a 20W T12 fluorescent lamp delivering 960 initial lumens at 6500K Daylight (CRI 79). It uses a Medium Bipin (requires starter) base and is designed as a Preheat lamp for preheat ballast + starter fixtures.
WATTAGE / TYPE 20W / T12 Preheat | COLOR TEMP 6500K Daylight | INITIAL LUMENS 960 lm | RATED LIFE 9,000 hr Rated Average | BASE TYPE Medium Bipin (requires starter) Confirm Socket |
Technical Specifications
| Brand | Philips |
| Product Code / Model | 27328-4 / F20T12/D/ALTO |
| Lamp Type | Fluorescent — T12 Preheat |
| Wattage | 20W |
| Base | Medium Bipin (requires starter) |
| Color Temperature | 6500K Daylight |
| CRI | 79 |
| Initial Lumens | 960 lm |
| Design (Mean) Lumens | 960 lm |
| Rated Average Life | 9,000 hr |
| Length | 24" |
| Bulb Diameter | 1.5" (T12) |
| Package Quantity | 30 |
| Required Ballast | Preheat ballast + starter |
Product Overview
The Philips 27328-4 F20T12/D/ALTO is a 20W T12 preheat fluorescent lamp delivering 960 initial lumens (960 lm design/mean) at 6500K Daylight, CRI 79. It is built for commercial and industrial fixtures where lamp length, base type, ballast type, wattage, and color temperature must match the existing system.
This lamp is best suited for maintenance replacement in offices, warehouses, retail stores, schools, garages, production areas, and utility spaces. Before ordering, confirm the Medium Bipin (requires starter) base, 20W wattage, and 6500K color temperature against your existing lamp or fixture label.
Compatible Applications
- Commercial fixture maintenance and retrofit replacement.
- Warehouses, loading docks, production areas, and utility rooms.
- Retail stores, schools, offices, corridors, and service spaces.
- Replacement for compatible F20T12 fluorescent fixtures.
Before Ordering – Verify
- Confirm the existing lamp matches F20T12/D/ALTO or an approved equivalent before ordering.
- Confirm the fixture socket matches the Medium Bipin (requires starter) base.
- Confirm wattage (20W) and ballast type (Preheat ballast + starter) are compatible.
- Confirm color temperature (6500K Daylight) matches your project spec.
- Confirm physical length (24", 1.5" T12 diameter) fits your fixture.
Safety and Handling Guidelines
- Disconnect power before installing or servicing.
- Use only in fixtures designed for compatible F20T12 T12 fluorescent lamps and the correct ballast type.
- Fluorescent lamps contain mercury and should be recycled or disposed of according to local regulations.
- Follow the fixture manufacturer's instructions and local electrical codes for installation.
Compliance
- Manufactured by Philips Lighting.
- Contains mercury — dispose of/recycle per local regulations.
Ordering Information
- Product Code / Model: 27328-4 / F20T12/D/ALTO
- Description: 20W T12 Daylight fluorescent lamp, 6500K, 960 lumens, Medium Bipin (requires starter) base.
- Package Quantity (manufacturer case pack): 30.
- Sold individually unless otherwise noted on the product page.
For wholesale pricing, bulk availability, or help confirming the correct replacement lamp, contact ADL Supply at 1-800-235-3489.
