since  2000 start active "Green Fuel" is a new term in recent decades in temrs of the concerns of the international community
toward the end of fossil fuels.Solar energy such as other kinds of energy can change directly
or indirectly into other forms of energy, such as heat, electricty, etc.
Energy saving lamps is in the Fluorescent category of lighting equipments.
Their light emitted is nearly same as fluorescent lamps.