Quoted from PinMonk:

Time is money. I learned that the hard way by initially massively under-pricing the lens brackets I made. Once I had to make a bunch I realized I was way under-priced. Lermods has been doing this a long time so I assume that they, like Mezel, have a pretty good handle on the correct market price right off the bat, where morons like me have to stumble around and figure it out one at a time.
If this is too high, the market will shrug and the price will change or it will disappear. The correct price is whatever people will pay. You don't need to have everyone in the party bus, just enough to make it profitable.

Quoted from PinMonk:

What's the wavelength (nm) of that purple? Blues and purples are on the UV end of the spectrum and can damage retinas with continued exposure over time.

Quoted from PinMonk:

People can make their own choices, and most colors are great. I only get concerned when I see the deep blues and purples because they've become more prevalent and I don't think most people know the long-term exposure risks, especially to young eyes. That's why when I see "UV" kits or blues and purples I encourage publication of the wavelength of the lights on that mod so people can make an informed decision. Lermods is the first one I've seen that actually published that information for their purple LED mod and they should be commended for it.