Philips PL-T 26W/835/4P Alto #458265

Philips 458265 PL-T ALTO 26W/835/4P Triple-Tube CFL – 3500K | 1750 Lumens | GX24q-3 Base

The Philips 458265 PL-T ALTO 26W/835/4P is a 26-watt triple-tube compact fluorescent lamp with a GX24q-3 four-pin base. It produces 1,750 initial lumens at a 3500K neutral-white color temperature with a CRI of 82. The lamp requires a compatible external electronic ballast designed for 26W four-pin PL-T compact fluorescent lamps. Before ordering, verify the product number, complete lamp designation, wattage, base configuration, color temperature, dimensions, ballast compatibility, and dimming requirements.

Technical Specifications

Product Overview

The Philips 458265 PL-T ALTO 26W/835/4P is a compact plug-in fluorescent lamp designed for fixtures requiring a 26-watt triple-tube light source. Its folded tube configuration provides substantial light output within a compact physical envelope, making it suitable for compatible recessed, surface-mounted, and decorative commercial fixtures.

The lamp produces 1,750 initial lumens at 3500K. This neutral-white color temperature falls between warmer 3000K lamps and cooler 4100K lamps, supporting general illumination in compatible office, retail, institutional, and hospitality environments.

This lamp does not contain an integrated ballast. It requires an external electronic ballast specifically approved for 26W PL-T lamps with a GX24q-3 four-pin base. Matching the wattage or physical appearance alone does not establish electrical or socket compatibility.

Compatible Applications

• Commercial recessed downlights designed for 26W PL-T lamps
• Office and institutional lighting
• Retail and hospitality fixtures
• Wall sconces using compatible GX24q-3 sockets
• General interior lighting fixtures with approved electronic ballasts
• Maintenance replacement where Philips product number 458265 is specified

Before Ordering – Verify

• Product number: Confirm Philips product number 458265.
• Lamp designation: Verify PL-T ALTO 26W/835/4P.
• Wattage: Confirm the fixture and ballast are designed for a 26W PL-T compact fluorescent lamp.
• Base: Verify the socket uses a GX24q-3 four-pin configuration.
• Pin count: This is a four-pin lamp and is not interchangeable with two-pin GX24d lamps.
• Color temperature: The 835 designation identifies a 3500K lamp with an approximately 80-series CRI.
• Ballast compatibility: Confirm the exact ballast model lists 26W PL-T or GX24q-3 lamp operation.
• Dimming: Dimming requires a compatible electronic dimming ballast. A standard electronic ballast does not automatically provide dimming.
• Dimensions: Verify the fixture accepts an approximately 126.7 mm lamp length and 41 mm diameter.
• Sibling wattages: GX24q bases are keyed by wattage class. Do not substitute an 18W, 32W, or 42W lamp solely because the base appears similar.
• Conflicting number removed: Product number 433391 is not used in this listing because you confirmed product number 458265.

Safety and Handling Guidelines

• Disconnect and lock out electrical power before inspecting, installing, or removing the lamp.
• Use only with a compatible electronic ballast and GX24q-3 four-pin socket.
• Do not connect the lamp directly to line voltage.
• Do not force the keyed base into an incompatible socket.
• Insert the lamp by holding the plastic base rather than applying pressure to the glass tubes.
• Do not install a lamp that is cracked, chipped, loose, or otherwise damaged.
• Allow the lamp and fixture to cool before handling.
• Follow the fixture and ballast manufacturers’ installation and wiring instructions.
• Installation and ballast replacement should be performed by qualified personnel.

Compliance

• The supplied listing identifies this product as a Philips ALTO low-mercury lamp with approximately 1.4 mg of mercury.
• The supplied listing states that the lamp passes EPA TCLP testing; this should be confirmed against the official Philips specification sheet before publication as a formal compliance claim.
• This lamp contains mercury and should be recycled or disposed of according to applicable local, state, and federal regulations.
• No UL, ETL, RoHS, DLC, ENERGY STAR, Title 20, Title 24, or JA8 claim has been verified from an exact manufacturer PDF for product 458265.

Ordering Information

• Brand: Philips Lighting
• Product Number: 458265
• Product Number Format: 45826-5
• Lamp Designation: PL-T ALTO 26W/835/4P
• Wattage: 26W
• Color Temperature: 3500K
• CRI: 82
• Initial Lumens: 1,750
• Base: GX24q-3 four-pin
• Rated Average Life: 13,000 hours

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