I just received a pair bought from Thomann .... I've just tried in my basement for fun.

Attention, they are not controllable master / slave. I am disappointed because I hoped that connect them together and let them live their lives to make backdrops.
For use in color changer, there must be 6 DMX channels (red / green / blue / color macro? / Piloting strob / type selection autonomous operation).
The beam does not seem Wash but rather a circle 1.5 m in diameter to 3 m distance around which is pretty good to me.
The low power consolidated, it's great, it allows you to connect anywhere in projo ...

I had never seen a LED BY maintenenat and I need to choose an appropriate control system and use. (I hope to take advantage of the low heat for use in the face, very close to the musicians).

I pilot a 24 cricuit dmx console .... it's great.

Beware ... for the record, I'm lighting a set with classic CCA and I thought I went to take the ARPRE on the head. Ben yeah, with these ropes of different colors to identify notes, arpiste was going mad when I went from green to red to white with LED BY ....