Mechanical Engineering

I'm trying to create a lamp that uses gravity inspired by gravitylight 2 made by Martin Riddiford and Jim Reeves from London. I have almost no engineering skills and I need someone to explain to me exactly how I can calculate each gear to be able to achieve almost the same performance like them. Or at least the back calculations that show me what I need to reach that time. I tried to create the gear but I don't know if it is correct and what performance it can get on this motor https://www.newark.com/pro-elec/pel00884/solar-motor-low-intertia-rohs/dp/13AJ0721?ost=pel00884 and this led https://www.newark.com/multicomp-pro/mc011363/led-green-t-1-15cd-520nm/dp/21AH3263?ost=mc011363.

For each gear I used a pressure angle of 20 and a modulus of 2. All values were set randomly in Fusion to get that different contact between the teeth as explained by them. But my values are set random and I do not know what performance I can get with them or how to calculate it. Here I would need someone experienced who can explain the necessary calculations to me.

Reference

https://www.youtube.com/watch?v=Jsc-pQIMxt8&list=WL&index=38