What do farm vehicles require when operated at night?

Farm vehicles are required to have certain lighting to ensure safety and visibility when operated at night. The correct answer indicates that these vehicles must be equipped with two green lights on the front. This requirement is in place to help other drivers identify the vehicle's type and that it may be moving slower than other motor vehicles on the road.

Green lights signify that the vehicle is likely a farm vehicle, which differentiates it from other types of vehicles that may be on the road at night. This is crucial for road safety since many agricultural vehicles can be significantly larger and slower than typical passenger vehicles.

The other choices do not fulfill the same regulatory requirements or safety effectiveness for nighttime operation of farm vehicles. For instance, a single blue light on the rear might be associated with different types of emergency or service vehicles rather than agricultural vehicles. Similarly, the specified lights and reflectors do not align with the standard requirements for farm vehicles operating in low-visibility situations.