If it's zigbee, yes, you can just add a new zigbee device and it will rediscover without reset. Zwave you must remove and repair and readd.
[EDIT]
what type of bulb are you having troubles with?
If it's zigbee, yes, you can just add a new zigbee device and it will rediscover without reset. Zwave you must remove and repair and readd.
[EDIT]
what type of bulb are you having troubles with?