The ADJ H20 IR arrives with an IR jack that fits into your iPad and you can download software to run it. Or you have the http://www.adj.com/uc-ir unit listed as something you can buy separately. Are they both viable?
Thank you for reaching out to us. You can control your h2O dmx ir either thru your i pad or with the hand held uc ir remote. It's just your choice of preference. Let me know if you have any further questions.
Is there a way to have the fixture just do blue and stay blue when it's powered back on?
Just the unit by its self no. You will need this controller to access the colors with in the h20 ir. http://www.adj.com/uc-ir Let me know if you have any further questions.
What size room does this best fill?
The Ikon Ir will cover a nice size room. You will just have to position the light further from the wall to get a large coverage. The Ikon Ir does come with 3 different lenses beam angle 25, 32 or 43. Let me know if you have any further questions.