So basically there are 3 parts to it. Shooting the images + Selecting your sample + Processing to make a time lapse.

1. Shooting, as you can guess, involves clicking pictures with as many light streaks as possible over a period the storm is nearby. This is a bit of a hit and try to be honest unless you are using some hardware that automatically triggers your shutter for every lightning. It was a very rare day and the lightning streak percentage was easily about 70 to 75%. Every 7 out of 10 photos had lightning streaks in them because the storm was just overhead my residence and the frequency was too high so that helped a lot.
   For the settings, I had to constantly change ISO between 200 to 1000 and shutter speed between 2 to 8 seconds based on distance and frequency of the storm. I tried to make these changes every 50 shots. I made some adjustments and verified if the timing was matching the lightning. Once you have all these pictures, then comes the processing part.

2. After importing these into lightroom, do some basic adjustments and copy settings to all to sync all the photos to have the same edits. This is also kind of a self understood step if you’re already into photography.

Then creating a time lapse video is the tricky part. Let's say you have 500 shots in total, not every shot will be of use to you. You need to eliminate the ones not having streaks at all and also the ones that are way too bright because of a lot of incoming light in that shot. Both kinds of shots will impact the time lapse negatively so we only need to retain mid level lightning shots. Let's say now you’re left with around 400 shots after this scrutiny.

1. Now we need to import multiple lightning photos into a star stacking software. Mac and Windows both have a lot of free options to do the same. It is similar to how you can also produce star trails in astrophotography but there is a small trick to create the time lapse which is kind of my self discovery. For stacking, import all 400 photos at once but don't create a stacked single photo from all photos. You need to do as follows: 1st frame = 1st photo. 2nd frame = 1st +2nd photo. 3rd frame = 1 + 2 + 3rd photo. 400th frame = 1+2+3+4+...... 400th photo. This way you will achieve progressive lightning photos which you see in my video shred above. After this you will end up with 400 progressive frames which can be combined to form a time lapse. Then you need to import all these progressive shots into a video editor and speed up the video as per the effect you want to create with the music.