This question is for sci-fi writing novel. The premise is that this planet is generally habitable, and a human colony has been established. The point is that, at the equator, day (also night) last about 8 hours. The axial tilt is about the same as Earth's.

All other things should be considered pretty Earth-like. Humans can easily survive and eventually thrive on the planet. Gravity, atmosphere and temperature range is very similar.

Society has two distinct groups: the Company that makes the initial investment and the Colonists that enlisted. Company has minimal obligations to settlers for the first 100 years of colonization, using them little better than slaves for extracting and taking out valuable resources to pay back the investment. Colonists on the other hand signed up for that so that they escape the overpopulated and strictly-policed homeworld, so that their children's children would have a chance at freedom from the Earth's governmental regime. The initial colony started with almost 50.000 and at this point the second generation is coming of age.

Considering that all human activities have been adapted to the 24hour day-night cycle, both socially and biologically, what would the effect be on the colonists and the society that they will be building there? Will that fast rotation create hazards (or benefits) for humans on the planet?

This is my very first question in worldbuilding, so feel free to assist me in the proper way of asking, as well.