The easiest way to move lights is to first delete them on the old bridge. That will reset the light. Then you can just do a search for lights on the second bridge and it should be found automatically. If the light is not found, check out the following: How to connect Philips Hue lights to a Philips Hue bridge?
Can you have 2 Philips Hue bridges?
You can set up a second Hue Bridge in the Philips Hue app. When installing your Hue Bridge, plug it in anywhere with an available ethernet connection. If you have a large home, spreading out multiple Hue Bridges to cover the whole range of the house is best.