I have the power input in watts which is 5 and the lifetime in hours which is 50,000. The efficiency is left blank and I have no idea how I calculate it. Having a hard time with physics... Anyone know how to work it out?
I have the power input in watts which is 5 and the lifetime in hours which is 50,000. The efficiency is left blank and I have no idea how I calculate it. Having a hard time with physics... Anyone know how to work it out?
Not clear what you've been asked to do.
Consumer packaging on bulbs gives a measure of light output called lumens - if I was out shopping for lightbulbs I'd calculate the lumens per watt.