Difference between Insolation and Sunstroke

What is the difference between Insolation and Sunstroke?

Insolation as a noun is the incident radiant energy emitted by the sun which reaches a unit horizontal area of the earth's surface; the rate of delivery of such radiation while Sunstroke as a noun is heatstroke caused by an excessive exposure to the sun's rays.

We hope you now know whether to use Insolation or Sunstroke in your sentence.