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<task id="GUID-4FE4B515-EE2B-47DB-BECE-E390E4EB2C3E" xml:lang="en"><title>Switching

ON the lights</title><prolog><metadata><keywords/></metadata></prolog><taskbody>

<context>       <p>The LightOnL() method call switches ON the specified target

light. Multiple light targets can be specified using bitwise-or.</p><p>The

following code snippet demonstrates how to switch ON lights for <b>infinite</b> duration

with default intensity for multiple targets (Lights are switched ON with fade-in):</p><codeblock xml:space="preserve">iLight-&gt;LightOnL( CHWRMLight::EPrimaryDisplay | CHWRMLight::EPrimaryKeyboard );</codeblock><p>The following code snippet demonstrates how to switch ON lights for the <b>specified</b> duration

with default intensity for one target (Lights are switched ON with fade-in):</p><codeblock xml:space="preserve">//aDuration = 5000 milliseconds

light-&gt;LightOnL( CHWRMLight::ESecondaryDisplay, 5000 );</codeblock><p>After

the duration expires, if there has not been a previous infinite time duration

call in this session, the light state for target is changed to whatever state

was caused by the last infinite time duration call, or default state determined

by inactivity timer.</p><p>The following code snippet demonstrates how to

switch ON lights for the specified duration with specified intensity for one

target (fade-in is also controlled):</p><codeblock xml:space="preserve">// aDuration = 5000 milliseconds

// aIntensity = 50, intensity can be between KHWRMLightMinIntensity and KHWRMLightMaxIntensity, inclusive.

// aFadeIn = EFalse means that lights will turn ON instantly and fade-in is not used,

// ETrue would mean that lights would smoothly fade-in.

light-&gt;LightOnL( CHWRMLight::ESecondaryDisplay, 5000, 50, EFalse );</codeblock><note> All

devices do not support user-defined intensity or fade-in. In such scenarios,

the device behaves in its default method.</note></context>