I want to control the brightness of 12v LED strips through a mosfet module or a more complex PWM motor controller module I have which maybe necessary for power handling capability, although both will tested for efficiency
LED strips tend to be inefficient because they use resistors for current limiting. (But, I don't know if they are less efficient than incandescent lighting.)
"High Power" LEDs used for room-lighting (as opposed to accent or effect lighting) are normally powered by a constant-current switchmode power supply. (Technically, the dimmable versions are actually controlled-current designs.)