These look interesting. 900 lumens is about half the light of the scmr16 (each one is a little sun attached to your bike.) I found them for $120 each on amazon but didn't do any comparison shopping. Questions: Were did you purchase yours - happy with price/service? Mounting brackets come with package or sepparate? "Too bright for day time runners" - I have been using the TT's as day time runners - love the extra 'presence' it gives me. Too bright for use at night though (in traffic) as it cooks everyone in its path.