Instead of trying to repair the ding, you might want to concentrate on finding the appropriate product which does not mean the cheapest from China.
I did find this:
**broken link removed**
and with a little digging, this:
**broken link removed**
Class 2 is important and the 90 W limit is important, because that is the limit of a class II power supply. Note they are available in 40 W too. I suppose they want you to hook up red, blue and green tubes to each supply with a 20' maximum between the supply and the tube. Class II wiring doesn't have to be in conduit.
They are inherently "power limited" and low voltage. e.g HVAC thermostat wiring, doorbells, intercoms, and fire alarm systems (FAP =Fire Alarm Panels).
For a safety system I put together, I did use an FAP supply, which is typically UL approved. They typically are battery backed up and are 24 V. 12 and 24 are available. Another use is CCTV cameras.
This
http://www.altronix.com/products/pr...x.com/products/product.php?name=AL1024ULACMCB is typical, but not necessarily what you would need for a 24 DC distribution.
The idea is to provide fused or PTC (positive temperature coefficient thermister) protected power limited outputs. Usually battery backed up (unnecessary) and usually controlled in some fashion for "door strikes" etc. The FAP might, for instance force certain doors open. In some respects, you could use one for "emergency lighting" if you only need a 24 VDC supply.
I actually used one from this company:
http://www.alarmsaf.com/
It's also 120 to 277 V input. yep 277 is a lighting voltage.
I would suppose that you would order "spares"
So, with 15 transformers, you will have 15 DMX controlled lamps and arranged 3 x 5; 5 groups of red, green and blue.
Does, the current DMX controller operate on the primary (120/277) or secondary side (24 VAC)? You effectively want to use the variable AC to get "variable DC"?
EDIT: A little more info about class II and FAP supplies.