I did away with the lock tab, now I just reach back and move the switch lever, don't have to have to have my hand placed right to push the button. While night driving, I leave the blue light on (would like to find a red lenses), when I need the bright light, it is a easy flip of the switch.
As a side note, I have had a few of these lights that had a bad switch where the switch was forced passed the on point.