Which type of lighting is best for an outside front door that energy saving?

Solar-powered lighting: Solar-powered lights use energy from the sun to power the light fixture at night and don't require electrical cables that need to be run to the location as the use a panel that absorbs sunlight during the day to generate electricity. This makes them very energy-efficient, eco-friendly and relatively cost-effective in the long run as they draw upon a natural free resource- sunlight. As such, they require minimal additional energy.