The Solar dimmers work with VHO bulbs.
The ACLS is for MH
There is an option to hook up dimming T5HO ballasts to the IKS controller and make it work, but otherwise, I don't know of an "automatic" dimmer for the T5HO--what they have are standard dimmable T5HO ballasts that the easiest thing to do is hook up to a standard dimming switch, but it's manual....the IKS can run it automatically. I think so can the ELOS controller.