Philips 226720 FB31/TL835/Alto 31W

Product Overview

Philips 31W T8 U-Bend Fluorescent Lamp — 3500K Neutral White, G13 Medium Bi-Pin

The Philips 31W T8 U-Bend Rapid Start is a 31-watt T8 U-bend fluorescent lamp from Philips Lighting, designed for 2×2 troffer fixtures and other applications requiring a U-shaped lamp configuration. With a G13 medium bi-pin base, 3500K neutral white color temperature, CRI 82, 2,725 initial lumens, and a rated life of 15,000–28,000 hours, this lamp is suited for office, retail, healthcare, and general commercial lighting. Verify base type, wattage, U-bend leg spacing, and ballast compatibility before ordering.

Wattage

31W

T8 U-Bend

Lumens

2,725 lm

Initial Output

Color Temp

3500K

Neutral White

Base

G13

Medium Bi-Pin

Rated Life

28,000 hrs

Average Life

Technical Specifications

Brand	Philips Lighting
Lamp Type	T8 U-Bend Fluorescent — Rapid Start
Wattage	31W
Initial Lumens	2,725 lm (at 25°C)
Mean Lumens	2,560 lm (at 25°C)
CRI	82
Color Temperature	3500K Neutral White
Base Type	G13 Medium Bi-Pin
Start Type	Rapid Start
Rated Average Life	15,000–28,000 hours
Max Overall Length (MOL)	22.6"
Leg Spacing	1-5/8"
Diameter	1" (T8)

Product Overview

This Philips 31W T8 U-bend rapid start lamp is designed for 2×2 troffer fixtures and other commercial applications requiring a U-shaped T8 fluorescent lamp. At 3500K neutral white — positioned between warm white (3000K) and cool white (4100K) — this lamp delivers balanced, flattering illumination suited for offices, retail, healthcare, and hospitality environments where both visual comfort and task performance are important. CRI 82 provides good color rendering quality.

The 1-5/8" leg spacing and 22.6" MOL are critical physical specifications for U-bend lamps — confirm both dimensions match your fixture's lamp holders before ordering. The rated life range of 15,000–28,000 hours reflects variation based on burning cycle and ballast type.

Compatible Applications

2×2 troffer fixtures — Standard U-bend lamp configuration for 2-foot square recessed troffers in commercial ceilings.
Office, retail, and healthcare lighting — Neutral white 3500K output for task-oriented commercial and institutional environments.
Retrofit and maintenance replacement — Direct replacement for existing 31W T8 U-bend lamps with G13 base and 1-5/8" leg spacing. Verify ballast compatibility before ordering.

Before Ordering — Verify

Base Type: Confirm the fixture socket matches G13 Medium Bi-Pin.
Wattage: Confirm the fixture and ballast are rated for 31W T8 U-bend operation.
Leg Spacing: Confirm the fixture lamp holders accept a 1-5/8" leg spacing U-bend lamp. U-bend lamps are available in multiple leg spacings — confirm the correct spacing for your fixture.
Overall Length: Confirm 22.6" MOL fits within your fixture.
Color Temperature: Confirm 3500K neutral white matches your existing lamp or application requirement.
Ballast Compatibility: Confirm your fixture's ballast is compatible with rapid start T8 U-bend operation at 31W.

Safety and Handling Guidelines

Mercury Content: Contains mercury. Do not dispose of in regular trash. Recycle through an approved lamp recycling program in accordance with federal, state, and local regulations.
Allow Cooling: Allow lamps and fixtures to cool before servicing or relamping.
Correct Ballast Required: Use only with a compatible rapid start ballast rated for T8 U-bend lamps at this wattage.

Compliance

Contains mercury — subject to applicable lamp recycling and disposal regulations. California, Washington, and other states may have mandatory take-back or handling fee requirements.
Verify RoHS compliance status and additional certifications with the Philips manufacturer specification sheet prior to use in regulated installations.