How do you make the led lights like fluorescent lamps
A single led voltage current is 3v20mA, two and above 1.5 v batteries can be lit up, and a single small led with a 100 ohmic resistance can be plugged into a charging treasure.
Even in parallel, the current is large, and your battery power is absolutely a waste of money.
According to your requirements, you need to find a special manufacturer. At present you can only buy an LED light. The voltage depends on how many leds. You can't do it with a battery.