TL;DR - do all dimmers reduce maximum brightness of LED lamps?
So I had a recently bought a dimmer switch (Lutron Diva DVCL-153P) for an LED light, and I immediately noticed that the light was dimmer than before, even at full brightness. I grabbed a multimeter and tested the live wires (121v), and then the load end of the dimmer against common, with the light on (106v). I know that these new dimmers do fancy AC signal chopping (phase cut?), so my multimeter may just be confused..
Anyway, so I grabbed some other dimmers at Costco (FIET 72309) and tried one out. It was noticeably brighter than the Lutron, and the Fiet read 115v on live load with the light.
I emailed Lutron about it, and they told me that I can always expect 5-10% brightness cut whenever I put a dimmer in. This seems crazy to me - I spend good money to get brighter lights, and lose some because there's a dimmer? Why don't dimmers have full bypass at the top end? Or can I find a switch where I can toggle between dimmer and bypass?
Or am I missing something?