Dudes!!
I used to have Mitsubishi Lancer before this, and even a small reduction in the light intensity never occured; didnt matter how much I accelerated.
The Alternator is 45 A original Denso and tested. The battery is FB (Brand New). Logically, when we talk about an optimum design of electrical load distribution, this thing should never happen. If the OEM says the Idle RPM of the car should be around 800~1000 RPM, there should be an effect to the lights, AC, Radio if we run car below this RPM, otherwise the car should behave normally and all the systems should work smooth!!!
I hope you understand my point