Welcome to the Hailo Community!
The Hailo-8L has half the resources of the Hailo-8. Otherwise it runs at the same speed. The Hailo-8L modules are available as M.2 key B+M and A+E which both have 2 PCIe lanes while the Hailo-8 additionally is available as M.2 key M with 4 PCIe lanes.
In your conversion script you only need to change the architecture flag to hailo8l.