Can a light hit from a jump hitting the ceiling cause a concussion? feel a bit lightheaded from the hit but nothing serious?

That would depend on the force of the impact. A little impact is a slight injury, but usually nobody worries about that. Getting knocked to the ground would be an injury, and we might worry about that one. Common sense and judgement will help one decide when to go see his doctor. Questions like "Can this cause concussion?" are answered YES because many, or even all, things are possible in life.

By medical dictionary DEFINITION: A cerebral concussion is an acute closed head injury causing loss of consciousness, amnesia, or a combination of both. If this does not apply to your incident, you did not experience a concussion. From your post, does not appear that you suffered any significant injury, but if symptoms emerge, contact your doctor.