Controlling Multiple LED Drivers with single PWM Output

ReefingAround:
Hi Everyone,

I'm very new to this and have a question i can't seem to find an answer on.
I have an LED aquarium project where strings of LED's are controlled by buckpacks / drivers. My drivers accept a 0-5V pwm input.
Each of these drivers accept an PWM input to control the output current.

My problem is, I have a lot of drivers.

How many is "a lot"?

ReefingAround:
Can i split a single PWM output from my Arduino Mega to drive two or three LED drivers? Or will this affect the 0-5v signal the pwm output each driver would receive if i was try and run more than one driver off one pwm output?

It depends on the driver but you can almost certainly do more than 1. More than about 10? You might need to use a transistor to amplify the signal.