What would happend to the brightness of a lamp if you remove one of the cells?

If you remove one of the cells from a lamp that uses multiple cells in a series circuit, the overall voltage supplied to the lamp decreases. This reduction in voltage typically results in a decrease in brightness, as the lamp may not receive enough power to operate at its optimal level. If the lamp is designed to work with a specific number of cells, removing one could cause it to dim significantly or even turn off completely.