Losing top brightness when using tip120 and PWM with 70w LED panel I have been experimenting with pwm dimming using TIP120 on various high powered LED's, and have noticed a marked drop in the top level brightness compared to original connection without the tip 120 in line.
For instance a 70w panel connected with heavier gauge cable (not using jumper cables) no longer reaches full brightness with pwm set too full.
im using tasmota on a nodemc8266. 
Is there something inherent the hardware set up causing the loss that I am missing or is there a software limitation with PWM?
curious

thanks
Replace the TIP120 with a Low Rds N-channel MOSFET. Look at AOD508 or AOD514 for example, very low Rds, so it will develop very little voltage drop as the current increases.