ECN Forum Forums Technical Discussion Electrical Theory and Applications Dimmer type?

I'd imagine that you'd just about be able to get away with using any sort of Trailing Edge Dimmer.
Just as long as the VA rating of the dimmer was above the collective VA rating of the W/W transformer and the Input VA rating of the Electronic transformer.
I'd also add a small safety margin to the final VA rating of the dimmer, as a precaution.