Just purely out of interest this as I don't currently build but has anyone on here tried combining 405nm and 473nm?
I ask because I know theres a group buy on a dichro for red at the moment for combining 635 and 671 and as blue is the most expensive colour, and with 405nm blue diodes with tec available for as little as £20 with 100mw (150mw diode underdriven for long life), it would seem a sensible combination to try.
The violet content might possibly make white harder to acheive but on the other hand, I can see the weak violets and other blue dependant shades that are often weak because of low powered 473's due to cost could be boosted in intensity by 405. In fact on the white subject, if some extra means of control could be found, I don't see why 405nm couldn't simply be be turned off to allow white to be achieved if it wasn't achieveable with 405nm in the mix.
Any thoughts? Anyone tried it / intend trying it?