Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →The script did not fail loudly because a bulb broke. It failed because a helper value was valid, and a valid zero is not a missing value. An input_number helper with no initial: setting came up at its minimum, 0.0. The template’s fallback never ran, the lighting call received brightness 0, and the run finished with a success status. Home Assistant defines brightness 0 as off, but on the author’s installation the lights stayed exactly as they were. Both facts matter, and they point to different fixes.
What brightness 0 means in Home Assistant
Home Assistant’s light actions accept two brightness fields with different scales:
As an Amazon Associate I earn from qualifying purchases.
- brightness: 0 (off) through 255 (brightest).
- brightness_pct: 0% (off) through 100% (brightest).
Those are the documented meanings. The documentation also notes that light fields a particular light does not support may be skipped, so a request can be accepted without every field being applied. That is a separate question from what a zero means. The author of this case describes the result on their own installation as a no-op: the call went through and the room did not change. This article reports that observation as the author’s experience. It does not claim to know which layer of the integration produced the no-op.
How a valid zero got past the fallback
The TV scene read its ambient brightness from a slider backed by an input_number helper. A helper without an explicit starting value begins at its minimum. Here is a helper definition that avoids the problem by declaring the starting value:
#1 Best Overall
- CONVENIENT CONTROLS – Easily manage one or more lights in a room using this convenient remote control with nine buttons: on/off, dimming, four light modes, and a night light
- CUSTOMIZABLE BUTTONS – For extra convenience, the four numbered buttons can be customized in the WiZ app to function as shortcuts to your favorite light modes
- WIDE RANGE – Control your smart lights and devices up to a range of 15 meters (50 feet) in any normal indoor environment with partitions and walls
- WORKS WITHOUT WI-FI – This remote sends a signal directly to your lights or devices without relying on a local network, so it works reliably even if your Wi-Fi is down
- CONNECTED BY WIZ – Fully compatible with all Connected by WiZ products—use the WiZ app to set up and unlock all the benefits of smart lighting; not compatible with Philips Hue products
input_number:
tv_ambient_brightness:
name: TV ambient brightness
min: 1
max: 100
step: 1
initial: 70
unit_of_measurement: "%"A fallback in a template only applies when the input cannot be converted to a number. A helper that reads 0.0 converts cleanly, so the fallback is never reached. The author’s account is that both slider values read 0.0 after setup, and the default of 70 did not replace them. The lesson is to stop depending on conversion failure to catch a bad value, and to check the value against the range you actually want.
Fixing the script
- Declare a starting value on every helper. Add
initial:with a value inside yourminandmax, as shown above. - Guard the value explicitly. Convert it with
float(0), then reject anything that is not greater than zero. The fallback of 70 is the author’s choice for a TV ambient scene, not a required value. - Choose the action that matches the intent. If the goal is darkness, call
light.turn_off. If the goal is a dim but lit scene, send a positive level.
script:
tv_mode:
sequence:
- variables:
raw: "{{ states('input_number.tv_ambient_brightness') | float(0) }}"
level: "{{ raw | int if raw > 0 else 70 }}"
- action: light.turn_on
target:
entity_id: light.living_room
data:
brightness_pct: "{{ level }}"If you prefer to keep the helper’s range at 0 to 100, the guard above is still the safer design, because it handles a zero produced by any future change to the helper, not only the first-boot case.
Rank #2
- 【Alexa & Google Home Voice Control: Hands-Free Convenience】As smart bulbs that work with Alexa & Google Home, it supports voice commands to turn on/off, adjust brightness, and switch colors—perfect for cooking, baby care, or remote work. No hub required: download the AiDot App, integrate with Alexa/Google Home, then link the LED light bulbs to alexa devices or google—3 simple setup steps. It connects to 2.4GHz WiFi, ensuring stable, lag-free voice response for effortless control from anywhere
- 【WiFi & Bluetooth Dual Connection: Uninterrupted Control】Linkind smart light bulbs feature dual WiFi + Bluetooth connectivity for Uninterrupted Control—2x faster than single-connection bulbs. Enjoy anytime, anywhere control: turn on lights remotely before arriving home, or manage them locally when at home. With Bluetooth Backup, you stay connected even when WiFi is off—solving connectivity gaps in bedrooms or hallways. Benefit from blazing speed: quick setup and instant responses, no lag or delays. 【Note】Initial setup requires 2.4GHz WiFi (not 5GHz) + Bluetooth.
- 【Music Sync: Dynamic Light for Immersive Experience】 Via AiDot App, Linkind WiFi light bulbs can sync with music rhythm detected by your phone's microphone, changing colors and brightness with beats—ideal for birthday parties and family gatherings. It offers 4 preset modes（Party/Dynamic/Calm/Auto Rhythm）, allowing you to customize light effects based on music style. The sensitive rhythm detection ensures no lag between music and light, bringing immersive audio-visual enjoyment.
- 【DIY Fun: Creative Light Play】Unleash lighting creativity with AiDot App's unique features—add fun to daily life and parties. Light Show lets you DIY custom effects: create swing, loop, ripple, flow, fading, jumping, or other dynamic patterns to match your mood, no pro skills needed. Chat with Dotis AI directly: say“I need a party mood” or “give me calm vibe,” and it instantly generates tailored light scenes. Join the Light Lab Community to discover trending designs, share your creations, and innovate with fellow users. These exclusive DIY functions turn smart bulbs into a creative playground, making every lighting moment unique.
- 【Preset Scenes & Schedule: Smart Energy-Saving】Linkind e26 smart bulb provides 104 preset scenes（Festival/Reading/Sleep etc.）and timer/schedule functions. You can set it to auto-turn on at dawn（simulating sunrise）and off at night, reducing energy waste by up to 85% vs traditional bulbs. Group control function lets you manage multiple bulbs simultaneously, perfect for living rooms or entire homes. High-quality LED design ensures 25,000-hour lifespan, saving replacement costs.
A green run is not an outcome check
A successful run only shows that Home Assistant executed the actions in the script. It does not show that the room reached the requested state. Three details make this easy to miss:
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problems- Scripts run in order, but the caller may not wait.
script.turn_onstarts a script in the background and does not wait for it to finish. If another automation depends on the lights being set, call the script directly so the caller waits for it. - A success envelope means the action ran. When an API call executes an action that returns no response data, the response is
null. A null response is not evidence that a light changed. - Entity state is the outcome. Check the light’s state and attributes after the call.
Here is a pattern that calls the script directly and then waits for a visible result:
Rank #3
- Smart RGBIC Effects: RGBIC LED Strip lights for bedroom display multiple colors on one line at a time compared with traditional RGB lights. A colorful combination of LED strip lighting for bedroom brings a strong visual impact. (Not Support Alexa)
- Smart APP Control: You can unlock various features to personalize smart LED strip lighting via Govee Home App, getting rid of simple remote control. Adjust the colors and brightness to your preferences, turning a single light to vivid light shows.
- DIY with Inspiration: You can choose from a variety of lighting effects (16 million colors) and share your piece of art on the APP community. Also, we will regularly update AI-created themes on the APP to provide you with more options.
- Upgraded Music Sync Mode: Make your smart LED strip lighting for dance for an immersive home concert experience. Choose from 11 music modes and the integrated high-sensitivity mic will effortlessly sync with your favorite audio.
- 64+ Preset Scenes: Find the proper lighting effects that fit your emotions. You can choose from a selection of scenes to bring vivid colors, inspired by party, holidays, movie and more with a simple click on the Govee Home App.
- action: script.tv_mode
- wait_template: "{{ state_attr('light.living_room', 'brightness') | int(0) > 0 }}"
timeout: "00:00:05"
continue_on_timeout: falseThe wait fails the run if the brightness attribute does not move above zero within five seconds, which turns a silent no-op into a visible error. Adjust the condition if your scene is meant to be off, and remember that some integrations report state more slowly than others.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.TV state conditions need caution
The author reports that their LG integration never reported the TV as off, so a condition that waited for that state would never be true. This is one device report, not a general rule for LG televisions or for every integration. Before you build a TV-off condition, check what your entity actually reports in Developer tools > States.
Quick Recap
Best Value
- WHAT’S IN THE BOX: Includes one Hue Bridge that unlocks the full potential of your Philips Hue system, including automations, smart control from anywhere in the world, and so much more
- SECURE AND STABLE CONNECTION: With Zigbee advanced technology, the bridge ensures a reliable connection that won't strain your Wi-Fi, Hue lights work when your Wi-Fi is down
- CONTROL LIGHTS FROM ANYWHERE: The Hue hub enables out-of-home control, control your lights with the Hue app anywhere you have an internet connection, with your home assistant
- ENJOY SMART LIGHTING FOR YOUR ENTIRE HOME, INDOORS AND OUT: Add up to 50 lights and accessories to your smart lighting system, a Hue Bridge is required to control Hue outdoor lights and accessories
- LEVEL UP YOUR MOVIES, MUSIC, AND GAMES WITH SURROUND LIGHTING: Make your lights dance, flash, dim and brighten along to your movies, TV shows, PC and music, the sync requires HDMI Sync Box
Rank #4
- Stability Upgrade Quick Connection:Supports Bluetooth or WiFi connection.The improved WiFi technology let you quick connection and stay stable,no disconnection worries. Please keep the smart plug connected to your stable 2.4GHz network.(Note: Only 2.4Ghz WiFi)
- Hand-Free Voice Control:Smart plugs that work with Alexa and Googel Assistant. Just give a simple voice command to Alexa or Google Assistant to control your connected home devices. Enjoy the joy of smart home devices.
- APP Remote Control From Anywhere:You also can control your outlet timers anywhere anytime via the APP directly when you are away. Monitor and control connected electrical equipment in your home.The smart outlet plug compatible with GHome APP, Smart Life App and Tuya App.
- Schedules and Timer Function:Easy to set timers and add schedules to connected smart home devices circularly or randomly, making them work as scheduled like auto-off and auto-on to save energy and money. Such as lamps, fan, humidifier, Christmas light timers etc.
- Group Control and Sharing:You can set a group for some wifi smart plugs and control connected appliances with one tap. Also you can share your wifi outlet plug by App with your families and enjoy the smart life together.
Troubleshooting checklist
- After a restart, is the helper still
0.0? Open Developer tools > States and check the helper, then confirm thatinitial:is set. - Did the light’s
brightnessattribute change after the call? If not, check whether the call received a zero or an unsupported field. - Does your guard handle the value you expect? Test the template in Developer tools > Template with the helper set to 0 and to a positive number.
- Are errors hidden? Review Settings > System > Logs after running the script.
“
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
