Light baking is faster and better with V-Ray.
V-Ray for Unreal can render high-quality lightmaps in a fraction of the time by distributing the rendering across multiple machines. You can render on CPUs and NVIDIA GPUs to take advantage of all your available hardware. You can also use the Chaos Cloud service for easy rendering on demand. Because light baking is memory-intensive, V-Ray also provides an easy way for you to export your scene and render it anywhere without the overhead of having Unreal open or tying up your machine.
In addition to helpful light baking presets, V-Ray 5 for Unreal now lets you customize your settings for even more control when rendering lightmaps.