The exclusive Underground Lighting Collection of 1156 bulbs, a single-filament incandescent automotive bulb defined by its BA15s bayonet base, featuring two parallel side pins and one bottom contact point. The 1156 format is widely used in rear turn signals, reverse/backup lights, tail/position lights, and motorcycle lighting systems. Because it is a single-intensity bulb, it differs from the 1157 dual-contact format and is not interchangeable with BA15d or BAY15d sockets.
The products in this category are 1156 LED replacement bulbs, engineered to upgrade the original ~27W halogen 1156 incandescent bulb to a low-power, high-efficiency LED system. Operating on standard 12V DC automotive systems, these LED bulbs typically draw ~3–10W, dramatically reducing current consumption while increasing brightness and longevity.
This collection includes:
- 1156 Amber Turn Signal LED (No Hyperflash, Built-In Resistors)
Designed for front or rear turn signal applications, these amber LEDs replicate proper load using integrated resistor circuitry to prevent hyperflash and bulb-out warnings.
- 1156 White Canbus LED (No Hyperflash)
Optimised for reverse/backup light use, producing clean white output (≈6000K) for improved rear visibility and camera clarity.
- 1156 Red Brake / Turn Signal LED (No Hyperflash)
Designed for rear brake or signal applications in red-lens housings, maintaining DOT-compliant color output.
All bulbs use a bayonet twist-fit installation method, requiring insertion and rotation to lock securely into the BA15s socket. Because LED diodes are polarity-sensitive, correct orientation is required unless the bulb is built with non-polarity circuitry.
Electrical & Functional Integration
OEM 1156 Specifications:
- Voltage: 12V DC
- Wattage: ~27W incandescent
- Base: BA15s single-contact
- Beam: 360° filament glow
1156 LED Specifications (Upgrade):
- Voltage: 12V compatible
- Wattage: ~3–10W
- Output: ~1000–2500 lumens (high-power models)
- Instant-on illumination
- Lower thermal output
LED versions reduce electrical load, which can cause hyperflash or dashboard error codes in modern vehicles due to lower current draw. This collection specifically features built-in resistor CANbus-ready designs, eliminating the need for external load resistors in most applications.
Color & Legal Compliance Alignment
- Amber (≈2000K) – Required for front and rear turn signals in most jurisdictions
- Red – Required for brake or rear position lamps
- White (≈6000K) – Approved for reverse/backup lights and some DRL uses
Color must always match the intended function and lens configuration to maintain DOT lighting compliance.
Compatibility & Retrofit Clarifications
1156 vs 1157:
1156 uses a single bottom contact, while 1157 uses dual contacts for dual intensity. These formats are not interchangeable, and incorrect installation can result in non-function or socket damage.
1156 vs 7506:
Electrically similar, but naming conventions vary by region. Base verification is recommended before purchase.
Housing Compatibility: Most 1156 bulbs operate within reflector-type housings, requiring LEDs that provide wide-angle light dispersion (270°–360°) to avoid hotspots or uneven illumination.
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