Need help making a lighting effect.

Can someone help me make a lighting effect that will light up the whole map for few seconds like you would see during a thunderstorm i want something like this go to 0:15 mark.

to point you in the right direction, all you need is a directional light and in a blueprint, set its intensity to something like 100 and then back down to 0, use a random float between 0.1 and 0.6, and make it flicker a few times

Thanks i will try that.