We carry 5 MR's just in BAB all the time. First choice is the Precise, We go with the Titan if we need a BAB60 then, if we need a low lumen BAB60 then we use the Ushio, if we need more lumens than the Precise we go to the Titan BAB35 which is great when your using a lens since it is much more powerful than the Precise. Last would be special applications and a need for even higher lumens which we would use the Osram IR lamps in BAB40 and BAB60. Then if we still need more light we start this process all over in the 35 watt range. This process doesn't include when a narrow beam is need for special effects. We have spread sheets on lamp #'s, lumens, and all other specs. on the trucks for qick reference and stocking. Man it would be so much easier to just stock the PAR3635WFL wouldn't it.