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.
Nothing will happen to the possible output power of the power source i.e it will not increase. Each power source has its maximum possible output power. Adding more lamps in parallel will result in a drop in the circuit's total resistance which causes the total current drawn by the lamps to increase. Your wires might be burnt as a result so be careful.
I assume you mean the energy they use. It really depends on the type of lamps. Often, electrical energy is used. A candle, as well as a lamp with a wick, uses the chemical energy in whatever fuel it uses (for example, the wax, in the case of a candle).
The heat source typically heats up to high temperatures and this means solid wax lava lamps must melt first.
Many lamps use electrical energy, but some lamps use chemical energy, for example a kerosene lamp or a candle.
Lava lamps !!!
Energy efficient table lamps are available in many online shops such as LampPlus and YLighting. Lamps can even be made energy efficient by changing the light bulbs to fluorescent spiral bulbs.
i Brandon invented energy
Electrical energy is transformed into electromagnetic energy.
lamps
Renewable energy is the first source of energy. Trees or gathered wood wer eued for fuel, In area without trees gahtered dung was burnt, Oil lamps contained fat, vegetable oils or bees wax.
It is not the decision between lamps and ceiling lights that determine energy efficiency, but it is the bulb that matters. Try to use eco-safe lightbulbs to save energy.
Different light bulbs, lamps, flashlights, LEDs.