How many light bulbs are there in an average hair salon?

15-30

Just one, but it requires someone with a modicum of intelligence to remove the old one and replace it. :)

This just an example of how to answer this question: 1 in the porch outside the front door? 1 outside the back door or on the balcony if it's an apartment? 1 in the hall? 1 on the stairs? (Maybe, we...

it takes 1 C type battery <><><> That answer is not really very helpful because the question doesn't say what the voltage of the light bulbs is! This question cannot be answered...

a lot