Difference between life cycle and life span of an insect

Hi good day,

can anyone explain to me the difference between life cycle and life span of insect. I've  been trying to search this and in the end it got me confused..

Does life cycle also included in insect life span?

thanks in advance......

Life span is how long a single insect will live

Life cycle is how long and how many off spring are produced so the cycle continues

Thanks scampi,

So far this is what i found

Cigarette beetle

Average life cycle: 45 to 50 days

Average life span: 6 to 7 weeks

is this correct???