# How does the number of Light bulbs in a series affect the current? [closed]

How does the number of light bulbs in a series circuit affect the current that is going through the circuit?

The more light bulbs you have in a series, the lower the current is. That is because the resistances of the light bulbs add. It is a bit more complicated than with linear resistors (two same resistors in a series have half of the current $I=\frac{U}{2R}$). It is because the resistance of the light bulb changes with the temperature (current) see wikipedia. For lower current, the resistance is lower. Therefore the current of two light bulbs is going to be less than the current of one light bulb but more than a half of one light bulb.