Evening lighting, after dusk, can require tungsten 200's, 300's, and Kinos, equipment that one person can hamper in one trip. Using the ambient light level and modern cameras, the lighting job can be much easier. There are still those set-ups in front of a bright building or against a bright sky where more horsepower is needed. But, you still must know where to put the lights and how to rig them safely. You cannot leave out safety because most of the remote activities happen with and around curious or friendly people.
Wattage is also a measurement of heat.
Less heat enables the talent to feel more comfortable. We also have access to portable air conditioning systems that fit easily on a grip van or grip truck.