Making a change on alternative energies is already a good choice, but to improve energy savings, we must switch to more efficient appliances such as LED bulbs.
In comparison to mercury halide lights, LEDs only consume 20% of the energy and have a life span of about 15 years. With lower consumption and longer lifespan, LEDs also represent a huge reduction of man and truck hours which equates to even bigger savings.
Alternative energies are part of the solution; we also have to consider energy conservation and labor management on a large scale. Real saving happens when we change how we use our energy.