NEEDED: Beacon/annunciator for Explosion-Proof Job

I am in the process of quoting a job with explosion-proof requirements. I have been able to get everything I needed, except for the alarm/process/run signalling lights and annunciators. I would like to have something similar to a tree (need multi colors and lack space on machines to add multiple lights and a multi sound annunciator. Anyone have any suggestions?

what class and group/division?

http://www.edwards-signals.com/index.cfm?level=44&PG=2

Have a look at:

http://www.malux.com/finland/fi/uploads/SM87SL_Range_6ds082_malux.pdf

http://www.malux.com/finland/fi/uploads/SL5_Range_6ds095_malux.pdf