On Tue, 18 Jun 2019 13:26:14 +0630, Oumati Asami wrote:

Do a 5W 12 volt light bulb and a 5W 110 volt light bulb (same type) give
off same amount of heat? In other words, for same type of bulbs, does
voltage affect the amount of heat given off?


Voltage (V) = Energy per charge

Current (I) = Charge per second

Power (W) = V * I = Energy per second

Hence, devices that consume the same power will dissipate the
same energy.

The difference between the two bulbs that you mention is
that one bulb (110 volt) will produce the same energy using
less current.

The only question is the form of the dissipated energy.

In the case of of an incandescent filament (light bulb)
all energy is radiant energy (light), but a portion of the
radiant energy can be infrared light (heat) and a portion
can be visible light. An incandescent bulb radiates a lot
of infrared but the exact proportion depends on the type
of incandescent bulb.

But there are other ways to produce light: LED, florescent,
etc. Only "bulbs" of the same type can be meaningfully
compared.