At 16, I think the issue is not 'bedtime', but avoiding any noise that disturbs other occupants when they have gone to bed - especially parents who have to get up for work in the morning!
Most teenagers go through a nocturnal phase. They will naturally stay up until 1-2am, or even later, and then of course find it hard to get up in the morning. (Really, if our society liked teenagers better, they'd start school at about midday for teenagers!
)
If you try to ban late nights, you will create lots of problems for your DS and yourself... You risk making late nights more exciting and tempting... No-one can sleep if they're not tired, and you can't make him sleep when you want him to... If you try, that will involve you having to stay up much later than you want to, to try to enforce it, and then becoming sleep-deprived yourself...!
Rather than having a 'bedtime', I think the rule needs to be something like "No noise between 11pm and 7am", or whatever hours suit your family as a whole.