How do I off the LED at specific time?

[s10114751]

How do I off the LED at specific time? For example, how can i make the LED turn off itself from 7am to 7pm?

[udka]

Please check this link to get timings.
http://forums.ni.com/t5/LabVIEW/Using-Real-Time-in-LabVIEW/m-p/2679437#M797257