I installed 2 incandescent bulbs in one of my cars. They work fine. Positive brass base (not aluminum). A small minus. The contacts on the base are not as strong as in older American lamps. But unfortunately, lightbulb production in America has been largely wiped out by offshore imports. Even the bulbs at the parts store for $6 a pair aren't as good as the old ones.
6 Pack ST58 Antique LED Edison Bulbs 60W Equivalent, 2700K Warm White, 95+ CRI Non-Dimmable E26 Medium Base Vintage LED Filament Light Bulbs
34 Review
12 Pack MR16 LED Bulbs 50W Halogen Equivalent - 5W GU5.3 4000K Neutral White Non-Dimmable 45 Degree Beam Angle For Landscape, Recessed & Track Lighting
39 Review
6-Pack Ascher 60W Equivalent Warm White 2700K LED Filament Light Bulbs - 80+ CRI, Non-Dimmable, Classic Clear Glass A19
42 Review
Ultra Warm White LED Mini Globe Light Bulb With E26 Screw Base - 1W Energy-Saving Equivalent To 10W Incandescent Bulb - G40 Low Watt Edison LED Bulb - 2200K Warm White Light
31 Review
Bulbrite A19 Solana WiFi Connected LED Alexa Smart Light Bulb, Single-A19, Tunable 2200K-6500K Color Temperature, Frost Finish
28 Review
E12 T22 Low Voltage Edison Bulb LED 12V-24V Vintage Tubular Night Light Bulb 1W 100 Lumen LED Candelabra Light Bulb 2700K 10W Equivalent Small Filament Bulb For RV,Out Door String Lights, Pack Of 25
15 Review
Illuminate Your Space In Style With I-SHUNFA'S Stained Glass LED Light Bulbs - Perfect For Home, Parties, And Festive Occasions
14 Review
Linkind Dimmable A19 LED Light Bulbs, 60W Equivalent, E26 Base, 5000K Daylight, 9.5W 840 Lumens 120V, UL Listed FCC Certified, Pack Of 12
12 Review