Hi guys. I've just finished replacing 12VAC normal downlighters with 220VAC LED Dimmable downlighters. My problem is that on some circuits where these LEDs are controlled by a dimmer swich, in the off-position , a couple of them are flicking while others are totally off and in the on position all of them work fine. When I swop them around to different positions, others start flicking. What could be the likely cause and how do I rectify that? Another thing when you replace fluorescent tubes with LED tubes on an existing fitting, do you still need the capacitor because either way the lamp will come on having bypassed the ballast and removed the starter?