This diffuser has multiple light settings. You can set it to be a single solid color (of your choice, of course), or you can set it to rainbow mode, where it gradually changes to each color of the spectrum. The colors are bright enough to be seen, but at the same time they're dim(ish) to give the room a relaxed feel.
The Holan also has two mist settings. You can set the mist to spritz sporadically, or you can set it to a continuous mist.
If you're looking for a diffuser for the purpose of using oil blends that help with sleep, this one has an automatic shutoff function once all the water's gone, so you can fall asleep even easier with that knowledge! (My husband and I use sleep blends to help with insomnia).
