Hey folks! John here from Dexter Industries, founder and original co-designer of the dLight. I am ready to absorb all your anger and vitriol!
The dLights are not fully RGB. Some mistake was made in the design, we’re not sure what it is or how to correct it. It’s not a software problem; we see the same issue with the EV3 as the NXT. Furthermore, we see problems with the EV3 and some scenarios because of EV3’s limited amperage availability.
The red will not work. We have no plan to improve or repair the dLight; we are offering it while supplies last.
We weren’t sure what to do and were ready to take them off the market. A few customers contacting us about the product and wanted it anyways. We’ve left it up for sale, what remaining supplies there are. We’ve changed to description to not include red.
I hope that helps. If you bought the product through Amazon, and you need the red LED, return it because this product will not work for you. Exchanging it over and over won’t solve the problem. If you bought the dLight through our website and need the red light, go ahead and contact me through our website, and we’ll try to make it right.