LED Strips- all depends on what the client is willing to spend. Environmental Lights and Sowilo ([Link: sowilodesign.com]) are higher end and $$$. Amazon or anything else you can find on the web are OK to get the job done, but quality control is definitely lacking, so be prepared for multiple returns or fixing strips yourself.

Power Supply- As mentioned, Meanwell. It's the only option.

DMX control- Response Box from Engineering Solutions ([Link: response-box.com]). This blows away any other solution and I've tried just about all of them.