After replacing my fried switch in my m*g458 I pulled it back out to check how the new one was doing. With just 4 or 5 mins. use on new years eve it's showing some slight pitting. 10.5a. is just too much for the mag switch so I cleaned up the donut and switched bulbs to the 64440S. With 20.98v. left in my batterys at rest the 64440S settled at arround 5.5a. The bulb focused well with a very bright but smaller hot spot. Out side it doesn't have quite the spill of the 458 but it does out throw it handily. With over 5K bulb lumens this light is still quite impressive and with twice the run time of the 458.
Billy
Billy