Product Overview

Sylvania 40992 LED8T8L24FG835SUBG9 — SubstiTUBE® IPS Generation 9 2 ft T8 LED Tube, 8W, 1250 Lumens, 3500K
The Sylvania LED8T8L24FG835SUBG9 (item number 40992) is a 2 ft SubstiTUBE® IPS Generation 9 LED T8 lamp with a G13 medium bi-pin base and a frosted glass body. It is designed to operate on the fixture's existing instant start or select programmed rapid start electronic T8 ballast, drawing 8W and producing 1250 typical lumens at 3500K and 82 CRI, for a bare lamp efficacy of 156 lumens per watt. Rated life is 50,000 hours to L70 with a 5-year limited warranty (24/7 operation). Dimming for this order code should be confirmed with the factory (see Before Ordering). Because the ballast stays in the circuit, no rewiring is required, but the ballast must be a compatible electronic type. Confirm ballast model, lamp holder type, and fixture length before ordering.
| Wattage 8W | Typical Lumens 1250 lm | Color Temp 3500K | Ballast IS / PRS | Rated Life (L70) 50,000 hrs |
Technical Specifications
| Brand | Sylvania (LEDVANCE) |
| Item Number | 40992 |
| Ordering Abbreviation | LED8T8L24FG835SUBG9 |
| Product Family | SubstiTUBE® IPS LED T8, Generation 9 |
| Lamp Type | Ballast-compatible LED T8 (instant start / select programmed rapid start electronic T8 ballasts) |
| Base | G13 medium bi-pin |
| Length | 2 ft |
| Lens Material | Frosted glass |
| Lamp Power | 8W (average, rated on QHE2x32T8/UNV ISN) |
| Typical Lumens | 1250 lm (average, rated on QHE2x32T8/UNV ISN) |
| Bare Lamp Efficacy | 156 LPW |
| Color Temperature | 3500K |
| CRI | 82 |
| Beam Angle | 220° |
| Light Emitting Angle | 340° |
| Rated Life (L70) | 50,000 hours |
| Ballast Input Voltage | 120-277V and 347V compatible electronic T8 ballasts |
| Compatible Ballast Types | Instant start and select programmed rapid start electronic T8 ballasts; not for magnetic ballasts |
| Dimming | Datasheet inconsistent — see Before Ordering; confirm with factory |
| Power Factor | >0.90 |
| Total Harmonic Distortion | <10% |
| EMI / RFI | FCC Title 47 CFR, Part 18, Non-Consumer |
| Ambient Operating Range | -4°F to 113°F (-20°C to 45°C) |
| Location Rating | Dry and damp locations; cannot come in direct contact with water |
| Fixture Compatibility | Suitable for open and enclosed fixtures |
| Tube Guards | Glass lamps are suitable for use with tube guards |
| Maximum Lamp-to-Ballast Distance | 20 feet |
| Overall Length (pin end to pin end) | 23.72" ± 0.055" (602.6mm ± 1.4mm) |
| Base Face to Opposite Base Pin | 23.45" ± 0.05" (595.65mm ± 1.25mm) |
| Base Face to Base Face | max 23.22" (589.8mm) |
| Bulb Outside Diameter | 1.02" ± 0.08" (25.9mm ± 2.0mm) |
| Case Quantity | 25 |
| DLC® | DLC 5.1 listed |
| Warranty | 5-year limited lamp warranty (24/7 operation); NLB Trusted Warranty Program |
| System Performance — Reference Ballast | QHE 2X32T8/UNV ISN (2 lamps) |
| Lamp Current | 0.17 / 0.08 A |
| System Power | 20W |
| System Lumens | 2400 lm |
| System Efficacy | 120 lm/W |
Product Overview
SubstiTUBE IPS LED T8 lamps are ballast-compatible tubes. They install into the existing fixture and run off the electronic ballast already in place, with no mercury, instant light and uniform light distribution. They are engineered for existing instant start and select programmed rapid start electronic T8 ballasts, which minimizes labor and recycling costs compared with a ballast-bypass conversion. The ballast stays in the circuit, so ballast compatibility is the key check before ordering; the lamp is not for magnetic ballasts.
Generation 9 uses a frosted glass body, and glass lamps are suitable for use with tube guards. Beam angle is 220 degrees with a 340 degree light emitting angle. Because the lamp is not affected by switching cycles, occupancy or vacancy sensors can be used with the existing instant start ballast for added energy savings, and there is no warm-up time: the lamp is instant-on with stable lamp-to-lamp color.
The datasheet is inconsistent on dimming for this lamp: its feature list names the 3 ft 10W (G9) and 2 ft 8W (G9) lamps as dimmable down to 10% with a compatible 0-10V ballast, while the order codes carry no DIM designation. Confirm with the factory before specifying this item for dimming.
This order code is factory-set to 3500K at 1250 typical lumens (8W). Other color temperatures in the same 2 ft 8W family are LED8T8L24FG830SUBG9 (3000K, item 40991), LED8T8L24FG841SUBG9 (4100K, item 40993), LED8T8L24FG850SUBG9 (5000K, item 40994). All color temperatures in this family share the same wattage and lumen output.
Compatible Applications
- Fluorescent troffer and strip fixture retrofits keeping the existing compatible electronic ballast
- Offices, conference rooms, schools, and institutional corridors
- Retail sales areas
- Spaces using occupancy or vacancy sensors
- Food preparation and processing areas (NSF/ANSI Standard 2 listed)
- Fixtures using tube guards for glass containment
- Dry and damp locations, open or enclosed fixtures
Before Ordering — Verify
- Confirm the existing ballast is a compatible electronic instant start or select programmed rapid start T8 ballast with 120-277V or 347V input. Because of the number of ballast designs and topologies, test the lamp on existing ballasts before installing mass quantities.
- This lamp will not operate on magnetic ballasts. Do not use it with older dedicated voltage (120V only or 277V only) ballasts — their electronic components degrade over time and may become unsuitable for the lamp.
- Confirm lamp holder type. For instant start ballasts, use lamp holders with an internal shunt or wired in a shunt configuration. For programmed rapid start ballasts, use rapid-start (non-shunted) lamp holders.
- De-lamping: not allowed for ISH ballasts. For approved ISN and ISL ballasts, de-lamping is allowed for only one lamp so long as the ballast factor remains below 1.20 (for example, a 4-lamp ballast may be run with 3 lamps).
- Do not use with other LED or fluorescent lamps on the same ballast.
- Confirm the ballast is mounted within 20 feet of the lamp.
- The datasheet feature list says the 3 ft 10W (G9) and 2 ft 8W (G9) lamps are dimmable down to 10% with a compatible 0-10V ballast, but these order codes do not carry the DIM designation in the ordering table. Confirm with the factory before specifying this item for dimming.
- Confirm fixture length. This is a 2 ft lamp with an overall length of 23.72" ± 0.055" (602.6mm ± 1.4mm).
- Color temperature — this item is 3500K. Siblings in the same family: LED8T8L24FG830SUBG9 (3000K, item 40991), LED8T8L24FG841SUBG9 (4100K, item 40993), LED8T8L24FG850SUBG9 (5000K, item 40994).
- Confirm ambient conditions stay within -4°F to 113°F (-20°C to 45°C) and that the lamp will not come into direct contact with water.
- Confirm case quantity — this item is supplied 25 per case.
- Where a utility rebate is involved, confirm current DLC® status for this item at qpl.designlights.org. The datasheet lists this item as DLC 5.1.
- If the QUICK 72SUB+ system warranty is wanted, install a new QHE instant start ballast together with the lamp; see the manufacturer's website for details.
Safety and Handling Guidelines
- Turn off power to the fixture before installing, inspecting, or maintaining lamps.
- Install and operate in compliance with the National Electrical Code, Underwriters Laboratories requirements, and all applicable local codes.
- Insert and align the tube fully in the lamp holders. Partial insertion causes poor or intermittent electrical contact, which can produce short lamp life and arcing, and arcing at the lamp holder can cause localized overheating.
- Read the installation manual supplied inside the packaging before beginning installation.
- Do not install on magnetic ballasts or on older dedicated single-voltage ballasts.
- Do not mix this lamp with other LED or fluorescent lamps on the same ballast.
- This lamp has a glass body. Handle by the end caps, avoid impact, and do not install a lamp with visible damage. Where breakage containment is a concern, use tube guards.
- Operate only in dry or damp locations. The lamp must not come into direct contact with water.
- This lamp contains no mercury and no lead, and emits no UV. Recycle or dispose of it in accordance with local requirements.
Compliance
- cULus listed to UL 1993.
- ETL listed.
- DLC 5.1 (datasheet certification list); this item's status: listed.
- NSF listed to NSF/ANSI Standard 2 — Food Equipment.
- FCC Title 47 CFR Part 18, Non-Consumer.
- RoHS compliant.
- Lead free and mercury free.
- No UV emission.
- 5-year limited lamp warranty based on 24/7 operation; NLB Trusted Warranty Program. A QUICK 72SUB+ system warranty is available when a new QHE instant start ballast is installed with the lamp.
Ordering Information
- Item Number: 40992
- Ordering Abbreviation: LED8T8L24FG835SUBG9
- Brand: Sylvania (LEDVANCE)
- Case Quantity: 25
- Lamp: 2 ft T8, G13 medium bi-pin, 8W, 1250 lm, 3500K, 82 CRI
- Lens Material: Frosted glass
- Rated Life: 50,000 hours (L70)
- Dimming: Confirm with factory
- Ballast Requirement: Existing instant start or select programmed rapid start electronic T8 ballast — verify compatibility
For wholesale pricing, bulk availability, or help confirming the correct replacement lamp, contact ADL Supply at 1-800-235-3489.