This question cannot be answered without knowing at least the voltage of the light bulbs and also the voltage of the battery that is being asked about.
A battery or batteries at the same voltage as the rating of the bulbs. Probably hooked in parallel.
From one up to as many as five.
because one battery distributes an even amount of power. the only way that both of the light bulbs with two batteries will stay the same brightness is if the batteries ans light bulbs are in a parallel circuit. then the power is distributed evenly between the light bulbs. If the lighbulbs are in a simple circuit then the first lightbulb (in a positive to negative direction) will be brighter because it uses up more energy before it can get to the second light.
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Filament of light bulbs are made up of Tungsten.
light up
When two light bulbs are in place, there will be a circuit created where electricity can flow through both bulbs. If the circuit is intact and the bulbs are functioning, they will both light up. If one of the bulbs is faulty or the circuit is broken, then both bulbs may not light up.
Bulbs light up when an electric current passes through the filament, which heats up and emits light. This process is called incandescence.
When you attach more batteries to a light bulb, it increases the voltage across the bulb, which leads to a higher current flowing through it. The increase in current causes the filament in the bulb to heat up more, resulting in increased brightness.
There's not a huge market for light bulbs that don't let any light out.
they light up
Yes, a circuit with two light bulbs connected in series can light up. Current flows through the first light bulb, then through the second, allowing both bulbs to illuminate. If one bulb burns out, however, both bulbs will go out.