Yes, wedge bulbs need to be more carefully sized than you might think, as attested to by my own small collection of spares that don't fit into sockets.

If you've now got plenty of brightness, just for jokes try hooking up that old dimmer again. Even though it's a varistor and not chopping the volts into pulses, it should give you some LED dimming before the LEDs blink out. You may find that useful when you're on the highway at night and your night vision is slightly spoiled by having too bright a dash in your peripheral vision.
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Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now