Changing this to !extend style includes, hopefully, for now it mean more text in main.yaml

esphome/device_packages/sensor-box-diy.yaml

@@ -1,23 +1,21 @@
 esp8266:
   board: d1_mini
 
-<<: !include esphome/partials/effects.yaml
-
 light:
   - platform: neopixelbus
+    id: light_pm25
     variant: WS2812
     pin: D4
     num_leds: 5
     type : GRB
     name: "${friendly_devicename} PM25"
-    effects: *shared_effects
   - platform: neopixelbus
+    id: light_pm10
     variant: WS2812
     pin: D3
     num_leds: 5
     type : GRB
     name: "${friendly_devicename} PM10"
-    effects: *shared_effects
   - platform: binary
     name: "${friendly_devicename} Lamp"
     output: relay

esphome/partials/effects.yaml

@@ -1,14 +1,13 @@
-light: &shared_effects
-  - strobe:
-  - flicker:
-  - addressable_rainbow:
-  - addressable_color_wipe:
-  - addressable_scan:
-  - addressable_twinkle:
-  - addressable_random_twinkle:
-  - addressable_fireworks:
-  - addressable_flicker:
-  - addressable_color_wipe:
+- strobe:
+- flicker:
+- addressable_rainbow:
+- addressable_color_wipe:
+- addressable_scan:
+- addressable_twinkle:
+- addressable_random_twinkle:
+- addressable_fireworks:
+- addressable_flicker:
+- addressable_color_wipe:
       name: Kingsday
       colors:
         - red: 78%
@@ -29,11 +28,11 @@ light: &shared_effects
           num_leds: 6
       add_led_interval: 100ms
       reverse: true
-  - random:
+- random:
     name: "My Slow Random Effect"
     transition_length: 30s
     update_interval: 30s
-  - random:
+- random:
     name: "My Fast Random Effect"
     transition_length: 4s
     update_interval: 5s