Philips 11.5T8/COR/48-835/IF20/G/DIM 25/1 #580266

Philips 580266 CorePro InstantFit 11.5T8/COR/48-835/IF20/G – 11.5W 4 ft T8 LED Tube | 2000 Lumens | 3500K | 80 CRI | G13 Base | UL Type A Ballast Compatible | 120–277V

The Philips 580266 CorePro InstantFit 11.5T8/COR/48-835/IF20/G/DIM 25/1 is an 11.5W 4 ft T8 LED tube on a G13 medium bi-pin base, producing 2000 initial lumens at 3500K with 80 CRI — a rated efficacy of 173 lm/W. It is a UL Type A lamp, meaning it operates on the existing fluorescent ballast with no rewiring, and Philips states the InstantFit range covers over 15,000 lamp and ballast combinations. Nominal lifetime is 50,000 hours at 70% lumen maintenance, with a 240° beam angle and a frosted glass envelope. This lamp is not dimmable.

Technical Specifications

Product Overview

Philips builds its TLED range in two architectures. InstantFit lamps are Type A or Type C: they run on a ballast, either the existing fluorescent one already in the fixture or a dedicated LED driver. MainsFit lamps are Type B ballast-bypass, double-ended, with a proprietary safety circuit to reduce shock risk during installation. This lamp is the InstantFit Type A version, which is the fastest possible conversion — pull the fluorescent tube, install the LED, done. Nothing is rewired, no ballast is removed, and the fixture needs no relabeling.

The tradeoff with Type A is ballast compatibility, and that is where Philips has invested: the InstantFit range covers over 15,000 lamp and ballast combinations, which is why it can be specified across a mixed building without auditing every fixture. Output is 2000 lumens from 11.5 W, a rated 173 lumens per watt, at 3500K and 80 CRI. The 240° beam angle gives a wide, even distribution appropriate to troffers and wraps rather than a narrow throw.

Nominal lifetime is 50,000 hours to 70% lumen maintenance, with a 50,000-cycle switching rating that suits occupancy-controlled spaces. Starting time is half a second and the lamp reaches 60% output in the same half second, so there is no perceptible warm-up. The envelope is frosted glass, not plastic, and the lamp operates from -20 °C to 45 °C ambient on any supply from 120 V to 277 V. Note that the lamp is not dimmable despite the DIM string appearing in the order product name.

Compatible Applications

• Commercial office lighting in recessed troffers, wraps, and strip fixtures
• Fluorescent-to-LED conversions where fixtures cannot be taken out of service for rewiring
• Occupied-space retrofits where relamping must happen during business hours
• Leased premises where modifying fixture wiring is not permitted
• Educational facilities, healthcare corridors, and institutional buildings
• Retail sales floors and back-of-house areas
• Existing 4 ft T8 fixtures with G13 lampholders on a compatible fluorescent ballast
• Occupancy-sensor controlled spaces, given the 50,000-cycle switching rating
• Projects pursuing DLC-based utility rebates, with the specific model confirmed qualified

Before Ordering – Verify

• Confirm the existing ballast is compatible. This is a UL Type A lamp that operates on the fluorescent ballast already in the fixture. Check the specific ballast against Philips’ InstantFit compatibility list before committing to a large order — compatibility is by ballast model, not by ballast type alone.
• Do not install this lamp in a fixture whose ballast has been removed or bypassed. That configuration requires a Type B MainsFit lamp.
• Confirm the design does not require dimming. This lamp is not dimmable, notwithstanding the DIM string in the order product name.
• Confirm the lampholder is G13 and the fixture accepts a 47-1/4 in. lamp.
• Confirm the color temperature. This lamp is 3500K, color code 835. Mixing color temperatures within one space is visible.
• Confirm the ambient stays within -20 °C to 45 °C and the case temperature at or below 104 °F.
• Confirm remaining ballast life. A Type A lamp is only as reliable as the ballast driving it, and the ballast will typically fail before the lamp does.
• If a rebate depends on DLC qualification, confirm the exact model on the DesignLights Consortium qualified products list before purchase.
• This item is packed 1 lamp per pack, 25 packs per outer box.

Safety and Handling Guidelines

• Switch off the circuit before relamping.
• Allow the outgoing fluorescent lamp to cool before removal.
• The envelope is glass, not plastic. Support the lamp along its length, avoid impact or twisting force on the end caps, and handle breakage accordingly.
• Seat both bi-pin ends fully and rotate the lamp until it locks in the lampholder.
• Do not install in a fixture whose ballast has been removed or bypassed.
• Do not operate outside the -20 °C to 45 °C ambient rating.
• Recycle or dispose of removed fluorescent lamps according to local regulations, as they contain mercury. This LED replacement contains none.
• Relamping should follow all applicable national and local electrical codes.

Compliance

• UL certificate; UL Type designation TLED_Type A, UL listed HF
• DLC compliance per the manufacturer’s approbation marks; confirm the specific model at qpl.designlights.org
• EU RoHS compliant
• Classified by the manufacturer as an energy saving product
• Nominal lifetime of 50,000 hours at 70% lumen maintenance
• Color consistency within 6 SDCM
• Contains no mercury
• Specifications per the Philips product datasheet dated 2023, March 25; data subject to change

Ordering Information

• Order code: 580266
• Order product name: 11.5T8/COR/48-835/IF20/G/DIM 25/1
• Material Nr. (12NC): 929003556504
• Model number: 9290035565
• EAN/UPC: 046677580261
• Packaging: 1 lamp per pack, 25 packs per outer box
• Net weight: 0.441 lb per piece
• No ballast or driver is supplied; this lamp uses the ballast already in the fixture
• Case and project quantities available

For wholesale pricing, bulk availability, or help confirming the correct replacement lamp, contact ADL Supply at 1-800-235-3489.