A Home Assistant custom script for turning on zigbee lightbulbs in a less awful way than default.

hue_nicely.yaml

hue_nicely:
  alias: A Hue Nicely
  mode: queued
  fields:
    bulbs:
      name: Bulbs
      description: Turn zigbee-connected Hue bulbs on smoothly
      required: true
      selector:
        entity:
          domain: light
          multiple: true
    color_temp:
      name: Color Temperature
      description: Color Temperature
      selector:
        color_temp: {}
    color_rgb:
      name: RGB Color
      description: RGB Color
      selector:
        color_rgb: {}
    brightness:
      name: Brightness
      description: Brightness percentage
      selector:
        number:
          min: 0
          max: 100
    transition:
      name: Transition
      description: Time to transition to the new state
      selector:
        number:
          min: 0
          max: 10000
  variables:
    color_temp: '{{ color_temp|default("") }}'
    color_rgb: '{{ color_rgb|default("") }}'
    brightness: '{{ brightness|default("") }}'
    transition: '{{ transition|default(0) }}'
    light_pre_options: >
      {% macro add_string(key, value) -%}
        "{{ key }}":"{{ value }}",
      {%- endmacro %} {% macro add_list(key, value) -%}
        "{{ key }}": [{{ value|join(",") }}],
      {%- endmacro %}
      {% set option_dict = namespace(value="") %}
      {% if color_rgb != "" %}
      {%   set option_dict.value = option_dict.value ~ add_list("rgb_color", color_rgb) %}
      {% elif color_temp != "" %}
      {%   set option_dict.value = option_dict.value ~ add_string("color_temp", color_temp) %}
      {% endif %}
      {{ option_dict.value[:-1] }}
    light_on_options: >
      {% macro add_string(key, value) -%}
        "{{ key }}":"{{ value }}",
      {%- endmacro %} {% macro add_list(key, value) -%}
        "{{ key }}": [{{ value|join(",") }}],
      {%- endmacro %}
      {% set option_dict = namespace(value="") %}
      {% if brightness != "" %}
      {%   set option_dict.value = option_dict.value ~ add_string("brightness_pct", brightness) %}
      {% endif %}
      {% if color_rgb != "" %}
      {%   set option_dict.value = option_dict.value ~ add_list("rgb_color", color_rgb) %}
      {% elif color_temp != "" %}
      {%   set option_dict.value = option_dict.value ~ add_string("color_temp", color_temp) %}
      {% set option_dict.value = option_dict.value ~ add_string("transition", transition) %}
      {% endif %}
      {{ option_dict.value[:-1] }}
  sequence:
    - repeat:
        for_each: '{{bulbs}}'
        sequence:
          - if:
              - condition: template
                value_template: '{{ is_state(repeat.item, "off") }}'
            then:
              - service: light.turn_on
                data:
                  brightness: 2
                  transition: 0
                target:
                  entity_id: '{{repeat.item}}'
              - delay:
                  hours: 0
                  minutes: 0
                  seconds: 0
                  milliseconds: 200
              - service: light.turn_on
                data: '{ {{ light_pre_options }}, "transition":0 }'
                target:
                  entity_id: '{{repeat.item}}'
              - delay:
                  hours: 0
                  minutes: 0
                  seconds: 0
                  milliseconds: 200
          - service: light.turn_on
            data: '{ {{ light_on_options }}, "transition":0.2 }'
            target:
              entity_id: '{{repeat.item}}'

Save that yaml file into your Home Assistant's config directory and then include it into configuration.yaml like this:

script hue_nicely: !include hue_nicely.yaml

Because the script specifies its input fields, it works with the visual editor: