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Precision Micro-Illumination: 3x7mm Miniature "Grain of Wheat" Bulb 💡✨

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.

Key Performance Features:

• ✅ 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.

Typical Applications

• 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.

Technical Specs:

• 📏 Dimensions: 3.0mm Diameter x 7.0mm Bulb Length.

• 🏗️ Technology: Incandescent Filament.

• 🏗️ Base Type: Wire Terminal (No base).

• 🏗️ Voltage Range: 12V 

Top 3 Customer Questions & Concerns 🙋‍♂️

1. ⚡ 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.

2. 🔧 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.

3. 💪 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.