How to lead a team of people elder to you?

I have to lead a team of consultants at work for pharma client, from work distribution standpoint I would be the single point of contact, all communications from both sides would be routed through me, in this team most people are either elder/older to me or are roughly of same age.
Want to know how to lead them, since they may not obey or might not like me being too bossy. How to make sure people work enthusiastically without any problems
Is there a way I can be polite as well be a good leader ?