I know at $4500 the Over Glow Retrofit kit for the LW4000 is pricey, but it would allow you to do what you want and then some without having to reinvent how to apply an LED light bar to the bridge. I don't know if it can be purchased with a UV LED light bar, but you could replace the one that comes with the kit for a few hundred dollars from Environmental Lights. You could use the RGB LED light bar that comes with the kit to just create the appearance of different color chemicals with every pass, plus you would get the ability to apply a curtain of carnuba wax on your top wash. The curtain of wax usually allows you to get an extra $2 for your top package. Just my 2 cents worth.