Control Light effect --> Pulse brightness

Any idea how? Documentation doesn’t have anything, and if I set the brightness lower it is overridden on the next pulse. Thanks

Strobe has the option, but not pulse?

light:
  - platform: rgb
    name: "Freezer Monitor LED"
    id: freezer_monitor_led
    red: output_component1
    green: output_component2
    blue: output_component3
    effects:
      -  pulse:
          name: "Slow Pulse"
          transition_length: 3s
          update_interval: 4s
      -  pulse:
          name: "Medium Pulse"
          transition_length: 2s
          update_interval: 2s
      -  pulse:
          name: "Fast Pulse"
          transition_length: .5s
          update_interval: .5s          
      - strobe:
          name: "Red Strobe"
          colors:
            - state: true
              brightness: 100%
              red: 100%
              green: 0%
              blue: 0%
              duration: 500ms
            - state: false
              brightness: 100%
              red: 100%
              green: 0%
              blue: 0%
              duration: 500ms              
      - strobe:
          name: "Error Strobe"
          colors:
            - state: true
              brightness: 100%
              red: 100%
              green: 0%
              blue: 0%
              duration: 500ms
            - state: true
              brightness: 100%
              red: 0%
              green: 100%
              blue: 100%
              duration: 500ms