How Many Leds Can A 9v Battery Power In Parallel. So if your source is 12v and your LEDs have a voltage drop of 35 1235v gives you 3 LEDs. 16V x 5 8V which is less than 9V.
You can connect 4 in series which will use up 8 volts. Hopefully you are able to find a driver that can accomplish your LED circuit with the diodes in-series however there are circumstances that might make it impossible. So you can light 33 x 3 99 LED for one hour or 198 LED for half hour and so on.
It depends upon LED type and specs but lets assume this one branch takes 15 mA for full LED brightness.
Two are microtivity IL604 5mm RGB Slow-Rotating LED. Yesterday I received a bag of 5mm LED they seemed to work just fine in series but when Im adding two in parallel only one is lighting. If you apply 30v directly across the LED assum. If you hook them up in series with one resistor at the head of the string the voltages add so using a figure of 3 volts per LED on average you could light 3 LEDs.
