Some Upgrades - 2 - The lights on my bike

Upgrades Part 1 -> Read here After the first set of upgrades, I just gave a break for the second set of upgrades. And when the time came, the immediate upgrade done was, lights. I have started with the complement lights Decathlon gave with my bike. When they gave up, I quite went through a range of most possible cheaper lights. Cheaper ones? I was a miser on spending for bike components / equipments and I wanted the ratio of every component cost to bike cost to be as low as possible. (Later got the gyan -> n components x m bucks per component was worse than 1 best component x (n x m) bucks per component)