LED in Lumia 930?

So, recently I played with Cfgmgr library. According to Windows Sysdev, LED GUID is

Code:

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DEFINE_GUID (HWN_DEVINTERFACE_NLED,0x6b2a25e2, 0xaaf5, 0x482c, 0x99, 0xa5, 0x62, 0x05, 0xcd, 0xcc, 0x17, 0x6a);

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I used a CM_Get_Device_Interface_List function to check it and function found this: \\?\ACPI#QCOM0D50#0#{6b2a25e2-aaf5-482c-99a5-6205cdcc176a}, which according to registry is LED notification device. So, does LED really exists or this is just a generic driver?
And if it really exist, I just need a working CreateFile and DeviceIoControl functions.
What do you think guys?

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