I have applied for an received almost instant authorization via aloft app to fly as a recreational flyer in controlled airspace with 100 foot and well defined space definitions. When I submitted at legal sunrise this am (6:15 am) it showed as starting now and would be effective till whatever duration up to 12 hours I specify. The confirmation I receive shows start time as 8AM which is well beyond legal sunrise. I understand no flight flights for recreational flyers in controlled airspace but why the delay from legal sunrise and sunset? As a recreational flyer/photographer this eliminates sunrise/sunset photography.