MT09R XHP70.2 lights with spring bypasses and Texas_Ace drivers are generally measured around 20,000 lumens or higher.
Texas_Ace posted measurements of many of his builds in his MT09R modding thread.
Here and here are two examples of 5700K lights measured at 20,000+ lumens by TA.
‘Newlumen’ measured a 5700K MT09R here at about 20,000 lumens.
Remember, these lights need quality high-drain cells to reach maximum output. I use Samsung 30Qs, but others in the thread mention using Sony VTC 6 or VTC 5A.
EDIT: Thanks, BlueSwordM. You posted while I was typing. 