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Input Voltage for Lighting Lamps Used in Vehicles

Input Voltage for Lighting Lamps Used in Vehicles and Vessels
The input voltage for lighting lamps used in vehicles and vessels shall be classified by vehicle and vessel type, with core specifications and fluctuation ranges as follows. Prioritize matching the rated voltage and confirm wide voltage capability during model selection.
I. Marine Lighting Lamps
Rated Voltage: Commonly DC 12V/24V (small boats/yachts), AC 220V (large vessels/cabins); some universal models are marked 100–240V AC or 9–33V DC.
Standard Requirements: Marine codes (e.g., CCS E-08 Lighting Lamps) allow voltage fluctuations: AC ±6%~−10%, DC ±6%~−10%.
Selection Tips: Navigation/signal lights mostly adopt 12/24V DC (adapted to marine power systems); cabin lighting usually uses 220V AC (stepped down via marine transformers).
II. Vehicle Lighting Lamps
Rated Voltage: 12V DC for passenger cars/light vehicles; 24V DC for commercial vehicles/heavy trucks.
Operating Range:
12V system: Standard 9–16V (extended to 6–18V per ISO 16750, covering cold start/load dump);
24V system: Standard 18–32V (corresponding to test voltage 28V).
Selection Tips: External lighting (e.g., headlamps) shall match 12V or 24V systems; universal models are often marked 12/24V compatible, and some wide-voltage types support 9–90V (suitable for various vehicles).
III. Quick Selection Recommendations
First confirm the electrical system of the vehicle or vessel: verify 12/24V DC or 220V AC for marine use, and 12V or 24V for automotive use.
Prioritize wide-voltage models (e.g., 9–33V DC, 100–240V AC) to adapt to voltage fluctuations and system switching.
Marine navigation/signal lights shall adopt 12/24V DC and comply with classification society specifications; vehicle external lighting shall meet voltage requirements of standards such as GB 4599.