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<task id="GUID-6F71BDAA-1639-4460-ACE8-BA677AE7D967" xml:lang="en"><title>Switching

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

<context><p>The <codeph>LightOnL()</codeph> method call switch ON the specified

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

following code snippet demonstrates how to switch ON lights for infinite duration

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

specified duration with default intensity for one target (Lights are switched

ON with fade-in):</p><codeblock xml:space="preserve">// aDuration = 5000 milliseconds

light->LightOnL( CHWRMExtendedLight::ESecondaryDisplay, 5000 );

</codeblock><p>After the duration expires, if there are no 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( CHWRMExtendedLight::ESecondaryDisplay, 5000, 50, EFalse );</codeblock><note> All

devices do not support fade-out. In such scenarios where fade-out is not supported,

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

</taskbody></task>