12V 21W BA15s Single Filament Incandescent Automotive Bulb
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৳ 15.00৳ 40.00 (-63%)
This is a standard 12V 21W single-filament incandescent automotive bulb featuring a clear glass globe and a durable BA15s (1156 / P21W) metal bayonet base [Image Context]. It provides bright, high-visibility illumination, making it the industry-standard choice for car and motorcycle turn signals, brake indicators, reversing lights, and localized incubator heating elements
Product Overview
The Standard 12V 21W Single-Filament Incandescent Automotive Bulb is a highly versatile, reliable lighting component designed for vehicular warning systems and localized heating applications [Image Context]. Featuring a clear glass envelope and a universal metal bayonet mounting base [Image Context], this globe delivers immediate, high-visibility illumination when powered. It serves as an industry-standard replacement part for automotive signaling arrays and is widely used by hobbyists for electronic load testing and custom DIY incubation systems.
Design & Structural Features
- Durable BA15s (1156 / P21W) Metal Base: Outfitted with a standard single-contact parallel-pin bayonet base [Image Context]. The base features two matching locking pins directly opposite each other on the sides, allowing you to push and twist the bulb securely into its socket to prevent it from shaking loose during high-vibration travel.
- Heavy-Duty Tungsten Filament: Engineered with a single, precisely coiled tungsten filament suspended by dual rigid internal support posts [Image Context]. This robust structural design resists vibration and thermal shock, ensuring a steady electrical path and long operational life.
- Optically Clear Glass Envelope: The classic teardrop-shaped glass bulb provides 360-degree, omnidirectional light output with zero color distortion, making it perfect for colored lens covers (such as amber turn signals or red brake housings).
- Thermal Output Capability: Because it is an incandescent bulb, it converts electrical energy into both light and ambient infrared heat. This characteristic makes it highly effective as a reliable, low-wattage heat source for small enclosures.
Technical Specifications
| Performance Feature | Verified Specification Value |
|---|---|
| Operating Input Voltage | Nominal 12 Volts DC (Supports typical 13.8V vehicle charging rails) [Image Context] |
| Power Consumption Output | 21 Watts (21W) at rated voltage [Image Context] |
| Approximate Amperage Draw | ~1.75 Amperes (Amps) continuous load |
| Base Configuration Type | BA15s / 1156 / P21W / S25 profile (Single Bottom Contact) [Image Context] |
| Base Locking Pin Style | 180° Parallel Side Pins (Even height orientation) |
| Illumination Source | High-temperature vacuum-sealed Tungsten Filament [Image Context] |
Common Applications
- Automotive Signaling and Safety: Replacing burned-out factory bulbs in passenger vehicles, trucks, and trailers for rear turn signals, reverse backing lights, and high-visibility brake indicators.
- Motorcycle Restoration: Servicing turn signal housings and tail lights on modern and vintage motorcycles that rely on traditional incandescent load values to prevent rapid blinking (hyper-flashing).
- DIY Egg Incubators & Brooders: Acting as a safe, low-voltage heating element in homemade egg incubator boxes, providing precise warmth to maintain stable temperatures for hatching.
- Benchtop Electronic Load Testing: Used by electronics technicians as a practical, low-cost resistive load to test the current output stability of 12V power supplies, solar regulators, and automotive battery chargers.
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