I successfully tested the Ymin 10mAh, 20 Farad lithium capacitor- it runs continuously and it hasn't been recharged since I received it. Next step is testing a variable resistor, a potentiometer which is pictured in the 1st and 3rd videos to toggle the dimness. I also tested positively a 12V car W5W "dome" LED light that I bought from eBay in 2017 - a 10 pack for $0.99- unsure what kind of voltage it uses (when connected to this breadboard), but similar ones use around 0.2Watts. Green LEDS (not the tinted aspect) use the least power, though using green for everything isn't always preferred.