Your thoughts about the so called "driverless" COBs?

[BornToBeAgrower]

Well, considering that those light bulb chips working great, we keep them on the table as always. Now, the thing is that you can get the full wavelength (or more specific, the wavelength that you prefer) when you buy the driverless COBs from Chinese sellers from Ali, like, 3500k, 6000k, 370-380nm, 450nm, 370-780nm, at the same price up or down without wasting a second prying the bulb and remove components. Of course, if i couldn't order from the internet, the bulbs is the way to go, but i can't mix and match normal LEDs from bulbs, like for example using 2 370-780nm chips and 4 3500k altogether for flowering.