If this is one of the Z-wave+ dimmers, then I'd recommend that you use @JasonJoel's excellent driver. It has a setting to turn a dimmer into a switch, which is very convenient.
Also, the "Enable Alternate Exclusion..." option next to the On/Off switch option provides faster status reporting.
Found here...
https://community.hubitat.com/t/release-ge-4xxxx-zw3010-enbrighten-z-wave-plus-dimmer-driver/18990
And if you have any GE/UltraPro/Jasco Z-Wave+ switches his switch driver is here:
https://community.hubitat.com/t/release-ge-4xxxx-zw4008-enbrighten-z-wave-plus-switch-driver/18991
