Product Overview
Sylvania 21721 FO40/865/XP/ECO 40W 60" T8 6500K Daylight OCTRON 800 XP Fluorescent Lamp
The Sylvania 21721 (FO40/865/XP/ECO) is a 40W 60" T8 fluorescent lamp on a Medium Bi-Pin base, part of the OCTRON 800 XP series. Rated 6500K daylight at 85 CRI, it delivers 3,650 initial lumens (3,468 mean @ 25°C/77°F) and is designed to operate on dedicated magnetic rapid start, electronic instant start, or programmed rapid start ballasts.
Wattage 40W 60" T8 |
Color Temp 6500K Daylight |
Lumens 3,650 Initial |
CRI 85 OCTRON 800 XP |
Rated Life 24,000 Hrs (3hr/start) |
Technical Specifications
| Item Number | 21721 |
| Ordering Abbreviation | FO40/865/XP/ECO |
| Series | OCTRON 800 XP |
| Bulb Shape | T8 |
| Base | Medium Bi-Pin |
| Wattage | 40W |
| Nominal Length | 60" |
| MOL (Maximum Overall Length) | 59.61" |
| Color Temperature | 6500K (Daylight) |
| CRI | 85 |
| Initial Lumens | 3,650 lm |
| Mean Lumens @ 25°C/77°F | 3,468 lm |
| Average Rated Life | 24,000 hours (3hr/start) |
| Standard Package Quantity | 30 per case |
| Mercury Content | Contains mercury – not for sale or shipment in CA, CO, HI, ME, MN, OR, RI, VT; recycle per lamprecycle.org |
Product Overview
This Sylvania OCTRON 800 XP lamp is a T8 fluorescent designed for dedicated magnetic rapid start, electronic instant start, or programmed rapid start ballast systems. For ballast/lamp system compatibility details, refer to the Systems Performance Guide in the SYLVANIA QUICKTRONIC Ballast Technology and Specification Guide.
Rated life is 24,000 hours (3hr/start), with 3,650 initial lumens dropping to 3,468 mean lumens over the rated life at 25°C/77°F ambient. This lamp uses a Medium Bi-Pin base and measures 59.61" maximum overall length.
Compatible Applications
- Fixtures specified for a 40W 60" T8 lamp with a Medium Bi-Pin base
- Fixtures running magnetic rapid-start, electronic instant-start, or programmed rapid-start T8 ballasts
- Direct replacement for the Sylvania 21721 or its FO40/865/XP/ECO ordering abbreviation
Before Ordering – Verify
- Confirm your ballast type is compatible – magnetic rapid start, electronic instant start, or programmed rapid start
- For instant-start operation, confirm your lampholders are shunted – non-shunted sockets require the two bi-pin contacts to be connected to each other
- Confirm 6500K color temperature matches the rest of your installation
- Confirm lamp length (60") and base type match your fixture
Safety and Handling Guidelines
- Always disconnect power before servicing or installing – wire per the ballast schematics and National Electric Code
- 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
Compliance
- Contains mercury – not for sale or shipment in CA, CO, HI, ME, MN, OR, RI, VT
- Recycle per lamprecycle.org
Ordering Information
- Item Number: 21721
- Ordering Abbreviation: FO40/865/XP/ECO
- Manufacturer Part Number: FO40/865/XP/ECO
- UPC: 046135217210
- 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.
