Halco ProLume 18W GU24 Spiral T2 CFL Bulb - 3500K Cool White, 1200 Lumens, 10,000-Hour Life

The Halco ProLume 18W GU24 Spiral T2 Compact Fluorescent is a self-ballasted, energy-efficient GU24 twist-lock CFL designed for code-compliant fixtures. It delivers 1200 lumens of bright 3500K cool white light—equivalent to a 75W incandescent—with good color rendering (CRI 82) and a long 10,000-hour rated life. Featuring instant-start electronic ballast, tri-phosphor coating, nickel-plated brass base, and compact spiral design, this non-dimmable bulb offers up to 80% energy savings, reliable low-temperature starting, and end-of-life protection. Perfect for residential ceiling fixtures, commercial downlighting, decorative sconces, and task lighting where energy efficiency and compliance matter.

Product Specifications

• Wattage: 18W CFL (75W Incandescent Equivalent)
• Base: GU24 Twist-Lock (4-Pin)
• Light Output: 1200 Lumens (initial)
• Color Temperature: 3500K Cool White / Neutral White
• CRI (Color Rendering Index): 82
• Voltage: 120V, 60Hz
• Dimensions: 3.9" L × 2.13" Dia (99 mm × 54 mm)
• Rated Lifespan: 10,000 hours
• Bulb Shape: T2 Spiral Compact Fluorescent
• Dimmable: No

Energy Efficiency Features

• Up to 80% Energy Savings: Compared to traditional incandescent lamps
• Tri-Phosphor Coating Technology: Improves color quality, efficacy, and lumen maintenance
• Instant Start Electronic Ballast: Fast, flicker-free ignition
• UL Listed for Enclosed Fixtures: Safe for use in covered or recessed applications

Technical Features

• Nickel-Plated Brass Base: Corrosion-resistant for secure, durable connection
• Low Temperature Start: Reliable operation down to 5°F (-15°C)
• End-of-Life Circuit Protection: Prevents overheating and cycling at end of life
• Compact Spiral T2 Design: Fits standard GU24 sockets with excellent light distribution

Recommended Applications

• Residential ceiling fixtures and recessed downlighting
• Commercial downlighting systems and troffers
• Decorative wall sconces and vanity lights
• Task lighting in kitchens, bathrooms, and workspaces
• Energy code-compliant retrofits in GU24-socketed fixtures

Safety & Compliance

• UL Listed for indoor use
• 90°C maximum fixture rating
• RoHS Compliant
• Title 20 Energy Compliance (California)
• Contains mercury — dispose of properly through recycling programs (do not throw in trash)
• Non-dimmable — do not use with dimmer switches

Energy-efficient GU24 CFL for cool white, bright lighting in residential and commercial fixtures—delivers strong output, long life, and code compliance. These CFLs are legacy products; LED GU24 equivalents provide 15,000–25,000+ hour life, no mercury, instant-on performance, often dimmable options, and even better energy efficiency with similar or superior brightness (e.g., 9–12W LED replacements).