I just replaced an old Pass and Seymour slide dimmer switch with a Lutron single pole switch with a side toggler. I'm using incandescent bulbs. The new switch dims the lights fine, but when I slide all the way to the top, the light is not as bright as it was with the previous dimmer in max position. I'd estimate it's 70-80% of previous max brightness. Any idea why this happening?
Many new dimmers are designed to “save energy” by limiting the full brightness to 80 or 90% of actual full brightness. Some of them have a hidden slider to adjust the top end. You’ll have to either shop for a different dimmer or put up with it.