What are some ways to control LED brightens when you switch them in and out of a circuit? I recently noticed that when I put larger than normal current limiting resistors on to Super Bright 5mm LED's, to dim them way down, that when I then switched one or two out of circuit the third one got brighter. I'm assuming this effect is always there but much less noticeable when you are running say 15mA through them rather than 0.5mA.