Product Overview
Philips PL-T 42W/835/4P ALTO - 42W Triple Tube Compact Fluorescent Lamp, 3500K Natural White, GX24q-4 4-Pin Base
The Philips PL-T 42W/835/4P ALTO (#149021, CFTR42W/GX24q/835) is a high-output, energy-efficient triple-tube compact fluorescent lamp with ALTO low-mercury technology. Delivering 3,200 lumens of bright natural white light (3500K) and a rated life of 12,000–20,000 hours, it offers excellent color quality, reduced environmental impact, and reliable performance in commercial and professional settings. Optimized for electronic ballasts for flicker-free operation and maximum efficiency.
Technical Specifications
| Wattage | 42W | Color Temperature | 3500K (Natural White / Neutral White) |
|---|---|---|---|
| Lumen Output | 3,200 lm (initial) | CRI | 82 |
| Rated Average Life | 12,000–20,000 hours (depending on ballast and starting cycles) | Base Type | GX24q-4 (4-Pin Plug-In) |
| Maximum Overall Length (MOL) | 6⅜ inches (162 mm) | ||
| Product Code / Ordering Code | #149021 (PL-T 42W/835/4P/ALTO or CFTR42W/GX24q/835) | ||
| Technology | ALTO® Low Mercury (~1.4 mg per lamp) | ||
Product Features & Benefits
- Triple tube design for optimal light distribution and compact fixture compatibility
- High energy efficiency — up to 75–80% savings vs. equivalent incandescent lamps
- ALTO low-mercury technology for reduced environmental impact
- Instant-start capability with compatible electronic ballasts
- Maintains ~80% lumen output at 40% of rated life
- RoHS compliant and designed for long-term reliability
- Excellent lumen maintenance and stable color quality
Recommended Applications
- Commercial office lighting (troffers, recessed fixtures)
- Retail store fixtures and display lighting
- Hospitality environments (hotels, restaurants, lobbies)
- Educational facilities (classrooms, hallways)
- Healthcare environments and general indoor ambient lighting
Important Information
- Requires compatible electronic ballast for optimal performance and life
- Contains a small amount of mercury — proper recycling/disposal required
- Standard versions not dimmable (check for dimming-compatible ballasts if needed)
- CE certified, UL listed, and meets UL 935 safety standards
- ENERGY STAR qualified (model-dependent) and Title 20 compliant
High-performance CFL for bright, natural white lighting in professional spaces—delivers strong output with eco-friendly design. These legacy lamps are increasingly replaced by LED alternatives for longer life (25,000+ hours), no mercury, and even greater energy savings.
