Product Overview
Sylvania Industry Trade Number 93 Automotive & Indicator Lamp 12.8V
Condition
New old stock (NOS). Unused inventory with clean brass base and intact C-6 filament. Markings legible on collar: 93. Sold each.
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Product Overview
Sylvania industry trade number 93 is a 12.8V miniature incandescent lamp designed for automotive signaling, interior illumination, and industrial indicator panels. Built in an S-8 clear glass envelope with a BA15s single-contact bayonet base, this lamp operates at 1.04 amps and 13.3 watts with a C-6 filament producing 15 mean spherical candlepower.
Key Features
- Industry trade designation: 93
- Bulb envelope: S-8 (S8) clear glass
- Base type: BA15s single-contact miniature bayonet (15 mm barrel with opposing index pins)
- Nominal voltage: 12.8 V
- Current draw: 1.04 A
- Power rating: 13.3 W
- Filament design: C-6 single filament
- Light output: 15 MSCP (Mean Spherical Candlepower)
- Rated average life: 700 hours
- Overall length: 50.8 mm (2.00 in)
Applications
- Automotive reverse and backup lamp replacement in vintage and classic vehicle lighting assemblies.
- Vehicle interior courtesy, dome, trunk, and instrument panel lighting fixtures.
- Industrial control panel status indicators and annunciator pilot lights requiring 12V to 14V DC operation.
- Custom low-voltage bench power supply load indicators, DIY automotive test rigs, and hobbyist illumination projects.
Frequently Asked Questions
What is the difference between an industry trade number 93 and trade number 1156?
Both bulbs share the BA15s single-contact bayonet base and S-8 envelope shape. Trade number 93 is rated at 1.04 amps and 13.3 watts with a 15 MSCP light output, while an 1156 bulb draws 2.1 amps at 26.9 watts and delivers 32 MSCP.
Can this 12.8V bulb operate on standard 12V automotive electrical systems?
Yes. Automotive 12V systems typically operate between 12.0V and 14.4V while the engine and alternator are running. The 12.8V rating represents the nominal test voltage for standard automotive miniature lamps.
How do I verify that this bulb matches my existing socket?
Check the base for a 15 mm diameter collar with two opposing indexing pins positioned at the same height and a single solder contact at the center bottom. The trade number 93 is stamped directly into the brass base collar.
The price-break table on this page gives the price per piece at each quantity.
There is a quiet satisfaction in the warm, instant glow of a real incandescent filament that modern solid-state chips never quite replicate. Twist the brass collar into the socket, lock the pins, and put honest light back where it belongs.
