Is it possible to change the "sunrise duration"?

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Accepted Answer

No, that is not possible with this model. The sunrise time is 30 minutes. 

Data sheet:
https://www.download.p4c.philips.com/files/h/hf3506_05/hf3506_05_pss_deuch.pdf

You can compare the models on the following page:
https://www.philips.ch/c-m-li/lichttherapie/wake-up-light/alle#filters=WAKEUP_LIGHT_SU%2C2016%2C2014%2C2013%2C2012%2C2011%2C2010%2C2009%2C2008%2C2007%2C2006%2C2005%2C2004&sliders=&support=&price=&priceBoxes=&page=&layout=12.subcategory.p-grid-icon

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Question about Philips Wake-up Light HF3506/05

Is it possible to change the "sunrise duration"?