I need advice how to choose the appropriate LED ring light for a B&L Stereozoom 4 microscope. Looking online, I see that ring lights range from 25 LEDs through 56 LEDs through 144 LEDs. Obviously more light is ususally better when working with scopes but as I'm trying to maintain some semblence of a budget, I'm in the 56 LED range. I got an offer for a 40 LED ring light ($1/LED) but don't know if 40 is sufficient (and helps my budget!) or I should get a 56. I'm using this scope at lower magnifications (< 20x), prepping Green River fish and looking for mesofossils and larger microfossils.
What do people suggest and what size of ringlights do people use?
Thanks!