What I bought:
Specs on the Amazon page:
| Voltage | 12-24V |
| Color | Amber Yellow |
| Power | 4.5W |
| Lumen | 1260 Lumens |
| Dimensions | 2.35 * 0.63 inch |
| Lifespan | 30,000+ hours. |
Specs as measured:
| "filament" | voltage | Amps | Watts |
|---|---|---|---|
| Bright (outer contacts) | 10v | .154A | 1.54W |
| 11v | .375A | 4.125W | |
| 12v | .350A | 4.2W | |
| 13v | .320A | 4.16W | |
| Dim (inner contacts) | 10v | .084A | .84W |
| 11v | .069A | .759W | |
| 12v | .064A | .768W | |
| 13v | .062 | .806W |
The car only has the outer / bright contacts, so a 7440 or 7443 will work interchangeably.