I bought one from some generic orchid store online, it serves it's purpose, and definetly something you want if you're not quite sure if you're providing enough/too much light. If you've never had one, it is something I would recommend so you can set your bearings, the human eye is notoriously bad for being able to judge light. You eventually can get the knack for whether your plants are happy, but that is assuming you hold all the other conditions steady and only vary light, which is hard to do.
|