Led strip, Mosfet IRF520

I got a working setup with a 8266 dev kit, 3 IRF520 on each color channel, enough power supply amp and I can manage all the color

The problem is I got no brightness, Led Strip is clearly not getting max of it capacity lumen

I try different frequency an get know change

output:
  - platform: esp8266_pwm
    id: red_output
    pin: GPIO0
    frequency: 500  # Adjust the frequency here
  - platform: esp8266_pwm
    id: green_output
    pin: GPIO4
    frequency: 500  # Adjust the frequency here
  - platform: esp8266_pwm
    id: blue_output
    pin: GPIO5
    frequency: 500  # Adjust the frequency here