WS2812b dimming brightness down to 10% gets nothing


when i set the brightness to 10% in homeassistant my WS2812b strip doesn’t emit any light at all, is that a feature or am i an idiot?

esphome yaml

  - platform: fastled_clockless
    chipset: WS2812b
    pin: D5
    num_leds: 150
    rgb_order: GRB
    name: "Led"