Product Overview
Sylvania 21598 FO72/835/XP/ECO 44W 72" T8 3500K Neutral White OCTRON 800 XP Fluorescent Lamp
The Sylvania 21598 (FO72/835/XP/ECO) is a 44W 72" T8 fluorescent lamp on a Single Pin base, part of the OCTRON 800 XP series. Rated 3500K neutral white at 85 CRI, it delivers 4,650 initial lumens (4,370 mean @ 25°C/77°F) and is designed to operate on instant start (slimline) ballasts.
Wattage 44W 72" T8 | Color Temp 3500K Neutral White | Lumens 4,650 Initial | CRI 85 OCTRON 800 XP | Rated Life 24,000 Hrs (3hr/start) |
Technical Specifications
| Item Number | 21598 |
| Ordering Abbreviation | FO72/835/XP/ECO |
| Series | OCTRON 800 XP |
| Bulb Shape | T8 |
| Base | Single Pin |
| Wattage | 44W |
| Nominal Length | 72" |
| MOL (Maximum Overall Length) | 72" |
| Color Temperature | 3500K (Neutral White) |
| CRI | 85 |
| Initial Lumens | 4,650 lm |
| Mean Lumens @ 25°C/77°F | 4,370 lm |
| Average Rated Life | IS 3hr/start: 24,000 hrs; IS 12hr/start: 36,000 hrs |
| Standard Package Quantity | 24 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 instant start (slimline) ballasts. For ballast/lamp system compatibility details, refer to the Systems Performance Guide in the SYLVANIA QUICKTRONIC Ballast Technology and Specification Guide.
Average rated life: IS 3hr/start: 24,000 hrs; IS 12hr/start: 36,000 hrs. It delivers 4,650 initial lumens, dropping to 4,370 mean lumens at 25°C/77°F ambient. This lamp uses a Single Pin base and measures 72" maximum overall length.
Compatible Applications
- Fixtures specified for a 44W 72" T8 lamp with a Single Pin base
- Fixtures running instant-start ballasts
- Direct replacement for the Sylvania 21598 or its FO72/835/XP/ECO ordering abbreviation
Before Ordering – Verify
- Confirm your ballast type is compatible – instant start (slimline)
- Confirm 3500K color temperature matches the rest of your installation
- Confirm lamp length (72") 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: 21598
- Ordering Abbreviation: FO72/835/XP/ECO
- Standard Package Quantity: 24 per case
For wholesale pricing, bulk availability, or help confirming the correct replacement lamp, contact ADL Supply at 1-800-235-3489.
