COBs with Integrated Drivers

[Vesti]

Hello Everyone - first time poster.

Any idea what the down side would be of using a few of these COBs in a DIY panel? I can't seem to get a straight info as to the effective difference between units with integrated drivers (that can be wired directly with 110) and the COBs that need an external driver.

https://www.ebay.com/itm/20W-30W-50W...f98ec07bc3616a

Seems to me they would be the simplest and by far the cheapest solution, but I don't see them used much so I also have to assume there is some problem with these from a tech/application standpoint.

Any thoughts?

And thanks.

[Rwise]

One advantage I see to remote mounting is to get the heat of the driver away from the LEDs so they last longer.

[Vesti]

Rwise. Yea, that's a good point, especially given that the heat situation in my space is a serious problem. Thanks.