Schedule mock interviews on the Meeting Board, join the latest community discussions in our Consulting Q&A and find like-minded Interview Partners to connect and practice with!
Back to overview

how many light bulb are on at any given time in the USA

For the expert here,

do you hava any goos idea.

thank you

3
3.0k
18
Be the first to answer!
Nobody has responded to this question yet.
Top answer
Anonymous A
on May 11, 2019

I am not 100% about this, curious to hear feedback:

[Pop US] * [1/people per household ] * [# rooms per household] * [light bulbs per household] = # light bulbs in the US. Let's assume another 25-50% for businesses.

Once we have the # of light bulbs, we need to give out how many are on in any given time. Let's assume a standard distribution across the day and say that 6 hours out of 24 hours the bulbs are on.

We have [# of lightbulbs US] * [6/24] = # lightbulbs that are on per hour.

@ Others: would this work?

2
M
on May 11, 2019

I agree with the previous answer. We might take additionally into account that not all bulbs are switched on at the same time - by a factor or so.

1
Vlad
Coach
on May 12, 2019
McKinsey / Accenture Alum / Got all BIG3 offers / Harvard Business School

Hi,

That's one of the most common market sizing questions and I've seen the solution in multiple casebooks. You can find it easily if you google.

Best!