# Illuminance Configure the details for parameter variables that contain illuminance values. ## Topics ### Creating an intent parameter [`convenience init(title: LocalizedStringResource, description: LocalizedStringResource?, defaultValue: Double?, defaultUnit: IntentParameter.Illuminance?, defaultUnitAdjustForLocale: Bool, supportsNegativeNumbers: Bool, requestValueDialog: IntentDialog?, inputConnectionBehavior: InputConnectionBehavior)`](/documentation/AppIntents/IntentParameter/init(title:description:defaultValue:defaultUnit:defaultUnitAdjustForLocale:supportsNegativeNumbers:requestValueDialog:inputConnectionBehavior:)-81yqr) Creates an app intent parameter with a default unit for the measurement. [`convenience init(title: LocalizedStringResource, description: LocalizedStringResource?, defaultValue: Double?, defaultUnit: IntentParameter.Illuminance?, defaultUnitAdjustForLocale: Bool, supportsNegativeNumbers: Bool, requestValueDialog: IntentDialog?, inputConnectionBehavior: InputConnectionBehavior, resolvers: () -> Spec)`](/documentation/AppIntents/IntentParameter/init(title:description:defaultValue:defaultUnit:defaultUnitAdjustForLocale:supportsNegativeNumbers:requestValueDialog:inputConnectionBehavior:resolvers:)-2486g) Creates an app intent parameter with a default unit for the measurement. [`convenience init(title: LocalizedStringResource, description: LocalizedStringResource?, defaultValue: Double?, unit: IntentParameter.Illuminance, unitAdjustForLocale: Bool, supportsNegativeNumbers: Bool, requestValueDialog: IntentDialog?, inputConnectionBehavior: InputConnectionBehavior)`](/documentation/AppIntents/IntentParameter/init(title:description:defaultValue:unit:unitAdjustForLocale:supportsNegativeNumbers:requestValueDialog:inputConnectionBehavior:)-73fj3) Creates an app intent parameter that specifies the unit for the measurement. [`convenience init(title: LocalizedStringResource, description: LocalizedStringResource?, defaultValue: Double?, unit: IntentParameter.Illuminance, unitAdjustForLocale: Bool, supportsNegativeNumbers: Bool, requestValueDialog: IntentDialog?, inputConnectionBehavior: InputConnectionBehavior, resolvers: () -> Spec)`](/documentation/AppIntents/IntentParameter/init(title:description:defaultValue:unit:unitAdjustForLocale:supportsNegativeNumbers:requestValueDialog:inputConnectionBehavior:resolvers:)-1ji9i) Creates an app intent parameter that specifies the unit for the measurement. [`convenience init(title: LocalizedStringResource, description: LocalizedStringResource?, requestValueDialog: IntentDialog?, inputConnectionBehavior: InputConnectionBehavior, optionsProvider: OptionsProvider)`](/documentation/AppIntents/IntentParameter/init(title:description:requestValueDialog:inputConnectionBehavior:optionsProvider:)-8j88q) Creates an app intent parameter with a list of selectable options. [`convenience init(title: LocalizedStringResource, description: LocalizedStringResource?, requestValueDialog: IntentDialog?, inputConnectionBehavior: InputConnectionBehavior, resolvers: () -> Spec, optionsProvider: OptionsProvider)`](/documentation/AppIntents/IntentParameter/init(title:description:requestValueDialog:inputConnectionBehavior:resolvers:optionsProvider:)-4hm4) Creates an app intent parameter with a list of selectable options that can convert the selected value. ### Accessing unit details [`var unit: IntentParameter.Illuminance?`](/documentation/AppIntents/IntentParameter/unit-5d6kq) [`enum Illuminance`](/documentation/AppIntents/IntentParameter/Illuminance) [`var defaultUnit: IntentParameter.Illuminance?`](/documentation/AppIntents/IntentParameter/defaultUnit-2j2ui) [`var supportsNegativeNumbers: Bool?`](/documentation/AppIntents/IntentParameter/supportsNegativeNumbers-6mvvw) [`var unitAdjustForLocale: Bool?`](/documentation/AppIntents/IntentParameter/unitAdjustForLocale-po5z) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)