Philips 40935-5 GBF 20ALR12FL32 - 20W 12V Halogen ALR12 Aluminum Reflector Lamp, Frosted Cover, BA15d Base, 32° Flood

The Philips 40935-5 GBF 20ALR12FL32 (also known as 6435/FR or replaces 34003-4) is a low-voltage halogen aluminum reflector lamp with frosted cover glass. This compact 20W 12V bulb provides a smooth, even 32° flood beam spread with 250 initial lumens of warm 3000K light and a 2,000-hour rated life. Featuring a corrosion-resistant BA15d double contact bayonet base and lightweight aluminum reflector, it delivers precise accent lighting with no hotspots, reduced fading, and excellent beam control—ideal for display, task, and ambient applications requiring low-voltage halogen performance.

Key Specifications

• Wattage: 20W
• Voltage: 12V (low-voltage, requires transformer)
• Base Type: BA15d (Double Contact Bayonet / Twist-Turn)
• ANSI Code: GBF
• Bulb Shape: ALR12 (R37 reflector, 37mm diameter)
• Beam Spread: 32° Flood
• Initial Lumens: 250 lm
• Color Temperature: 3000K (Warm White / Halogen Glow)
• CRI (Color Rendering Index): ~100
• Rated Average Life: 2,000 hours
• Dimensions (MOL x Diameter): 41 mm x 37 mm (1.61" x 1.46")
• Philips Order Code: 40935-5 (GBF 20W DC Bay 12V 32D FR)
• Replaces: Older Philips #34003-4

Product Features & Benefits

• Aluminum Reflector: Provides superior beam control, eliminates stray light, and directs heat out of the fixture.
• Frosted Front Cover Glass: Softens output for even distribution, reduces harsh streaks/hotspots, and protects the reflector for consistent color over time.
• Corrosion-Resistant Bayonet Base: Secure mounting, prevents freezing in socket, and enables compact, low-profile luminaire designs.
• Lightweight & Compact: Easy installation in tight spaces with high luminous intensity for precise accent lighting.
• Excellent Color Quality: CRI ~100 for true-to-life rendering with warm halogen glow.
• Versatile Wattage Options: Available in ALR37 (20W) and ALR56 (50W) series.

Recommended Applications

• Display lighting in retail showcases, museums, and galleries
• Accent and task lighting in kitchens, cabinets, and work areas
• Wall washing and general ambient illumination
• Landscape/pathway accent lighting (with weatherproof low-voltage fixtures)
• Track heads, recessed, or specialty low-voltage fixtures

Important Information

• Requires a 12V low-voltage transformer for operation (not line voltage).
• Handle with clean gloves — avoid touching the glass to prevent oil residue shortening life.
• Ensure proper ventilation in fixtures (halogens run hot).
• Fully dimmable with compatible low-voltage dimmers.
• No mercury; recyclable where facilities allow.

Classic low-voltage halogen reflector for precise, warm accent lighting with smooth beam control and durability. While reliable for display/task use, modern LED ALR12 equivalents offer longer life (up to 25,000+ hours), cooler operation, and lower energy consumption.