When you decrease amperage you increase led life. Agreed. When you decrease amperage you decrease lumens. So tell me how, when wired in parallel, two chips on one driver at half amperage provides more light than one chip at recommended amperage. I'm sorry but it doesn't work that way. Efficiency may be better. But that doesn't mean brighter per say. For example, at 500 mA you may get the total 100% lumens you were looking for. And at 1000mA you may get 75%. But no matter how you look at it, 1000mA current will be brighter than your 500mA current. I'm an electrician and this is what I do all day everyday.