What are the different source of electrical energy?
1.Alternator or Generator- windmill,thermal power,hydel power,atomic power.
all this makes mechanical rotaion enegryand coupled to alternator to give electical energy.
2.Battery cell (chemical reaction)
3. solar energy both photo voltic cell or Heat concentration method form sunlight.
That would depend on the sort of lamp it is. If it was a gas lamp it would be chemical energy If it was an electric lamp it would be electrical energy However you should understand that on Earth 99.9 % of the energy comes originally from the Sun. The Sun's energy is the ultimate source of stored chemical energy and the ultimate source of the electrical energy we use.