I have 40 LEDs pre-wired with resistors at 12V connected in a series and they won’t all light up. When I test a series of 5 lights together it works fine but any amount over 5 less in a series won’t work. I’m not sure why this is happening. My power supply is a 120V AC to 12V DC power adapter 5 ampere 60W. Should I be wiring in a parallel circuit instead?
I’m clueless on how to make all 40 work. I’m not electrician this is for a painting I’ve been hired to make, I’m an artist with little wiring experience.