Tom grows saltwater coral, and you use an LED light to simulate reef light from morning to evening. But it's very smart and he needs to connect it to an app. It requires Windows, but he's a Chromebook guy. Is there an emulator that can work with Chromebook? Leo says that he thinks the hardware has a generic interface and a BIN file. There are Linux apps that can do that. Google is starting to support using Linux on a Chromebook, so that's one way to go. Here's a REDDIT for that - https://support.ecotechmarine.com/hc/en-us/articles/206236998-I-have-Radions-but-do-not-plan-on-buying-the-ReefLink-how-do-I-program-them-. r/reeftank seems like a good place to hang out.
It would be much easier, however, to buy a used Windows laptop for that one purpose. He can get them for under $100.