This spell grants infravision to the recipient for the duration. There’s little to say about the spell beyond this, however using an item granting infravision is often smarter than expending time and spellpoints keeping this buff running for long periods of time. A ring of infravision can be bought in Arelium for very little gold, and there are many other pieces of gear which grant it.
The in game help reads:
No saving throw. Casting time: 5 rounds. Type of spell: neutral spell. Affecting stats: wis. Cast type: information. Spell point cost: 41. One ability many races in this realm possess, is the ability to see in the dark. This ability allows them to navigate freely in darkness, without the hinderance of showing their presence with their own light source. Usually an ability that is gained over many generations of living in dark environments, it can also be temporarily instilled through magical means.