Bring your scale models and vintage electronics back to life with the 3x7mm Miniature Incandescent Bulb. Commonly known as a "Grain of Wheat" lamp due to its ultra-compact teardrop shape, this bulb provides a warm, authentic amber glow that modern LEDs cannot replicate. Its tiny 3mm diameter and 7mm length make it the essential choice for tight spaces and detailed accent lighting.
Ultra-Compact 3x7mm Profile: The miniature glass envelope is designed for high-density applications, fitting easily into instrument panels, model train interiors, and small-scale dioramas.
Versatile Wire Leads: Features long, flexible tinned wire leads that allow for easy soldering or wrapping in custom lighting harness configurations.
Authentic Warm Glow: Unlike the harsh blue-white light of many LEDs, this incandescent filament provides a classic soft-warm spectrum ideal for period-accurate scale models.
Clear Glass Clarity: High-transmittance glass ensures maximum light output with 360-degree dispersion, eliminating dark spots in your displays.
Wide Operating Compatibility: Typically rated for 12V–14V DC, making it a standard replacement for automotive dashboard backlighting and hobbyist power supplies.
Model Railroading: Perfect for HO, N, and O scale locomotive headlights and passenger car interior lighting.
Automotive Instrumentation: Used as a replacement bulb for vintage car radio dials, gauge backlighting, and switch indicators.
Dolls Houses & Dioramas: Ideal for miniature street lamps, chandeliers, and fireplace effects.
Dimensions: 3.0mm Diameter x 7.0mm Bulb Length.
Technology: Incandescent Filament.
Base Type: Wire Terminal (No base).
Voltage Range: 12V
Can I use these with a 9V battery?
Yes. While rated for 12V, these bulbs will light up at 9V, providing a slightly dimmer, even warmer glow that often extends the life of the filament.
Are these polarized?
No. Being incandescent bulbs, they have no polarity. You can connect either wire lead to the positive or negative terminal without damaging the bulb.
Do these get hot during use?
Like all incandescent bulbs, they generate a small amount of heat. In very tight plastic enclosures, ensure there is a small amount of clearance or air gap to prevent warping over long operating periods.
