The mod is a fork of Hesperus, which aims to add even more fixes to the lighting engine then Hesperus added. It is currently being maintained as well. I have verified the mod works better then Hesperus. I've seen reduction in RAM usage when switching from Hesperus to Alfheim as my lighting optimization mod in my large modpack.
Why the mod should be added to Opticraft
The mod is a fork of Hesperus, which aims to add even more fixes to the lighting engine then Hesperus added. It is currently being maintained as well. I have verified the mod works better then Hesperus. I've seen reduction in RAM usage when switching from Hesperus to Alfheim as my lighting optimization mod in my large modpack.
Link to the real mod page
Ex: https://www.curseforge.com/minecraft/mc-mods/alfheim-lighting-engine
Optional Informations
It is made by the same guy that created Valkyrie.