Product Overview
Philips 6433 GBD 12V 20W Miniature Bayonet Narrow Spot Bulb
Condition
Unused new old stock. Stamped collar markings legible: PHILIPS 12V 20W GBD. Solder contacts and bayonet pins are clean with no signs of socket insertion.
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Product Overview
Aluline 37 series low-voltage tungsten directional bulb engineered for focused optical alignment and accent illumination. Operating at 12 volts with 20 watts power draw, the unit combines a 37 mm faceted aluminum dish and clear protective front glass with a standard dual-contact 15 mm bayonet base. A tight 6-degree narrow spot beam delivers intense center-beam output for specialized laboratory instruments, precision test setups, and architectural display fixtures.
Key Features
- Low-voltage 12V operation at 20 watts
- ANSI code GBD, Philips catalog type 6433
- Double-contact BA15d bayonet base with 15 mm diameter collar
- Faceted 37 mm diameter aluminum dish with integrated clear front glass
- 6-degree narrow spot beam spread delivering high center-beam intensity
- Pure 3,000 K output with a 100 CRI rating for accurate color rendering
Applications
- Servicing optical inspection heads, microplate readers, and legacy laboratory equipment that specify ANSI GBD lamps
- Replacing miniature spotlights in accent fixtures, display cases, and specialized low-voltage track systems
- Custom benchtop optical rigs, precision illuminators, and maker projects needing a compact, pre-aligned 12V spot source
Frequently Asked Questions
What base type does this lamp use?
This lamp uses a BA15d bayonet base, featuring a 15 mm diameter metal sleeve with two opposed locking pins and two solder contact points on the bottom insulator.
What are the physical dimensions?
The reflector face measures 37 mm in diameter, and the overall length from the front glass to the base contacts is 41 mm.
How can I distinguish ANSI GBD from similar BA15d reflector lamps?
The GBD designation specifies a 12V, 20W rating paired with a 37 mm diameter reflector and a 6-degree narrow beam spread. Other BA15d reflector lamps in the same diameter family carry wider beam angles, such as 18-degree or 32-degree spreads, or higher wattages like 50W.
Nothing matches the clean snap and focused punch of a true low-voltage halogen spot when precision light is the job. Drop it into the bayonet socket, lock the pins, and light up your workspace.
