I am using the SMD BOARD 36-1210 type LED 252 LUMENS (ebay/china) which are non-regulated type LED boards.
When you see in the specs the LED boards will operate from a 8-30VDC Voltage range then this would indicate they are using a regulator circuit to allow this.
If you can see a picture of the SMD boards you will see additionial circuit board parts in addition to just the LED small lights.
Those photos above showing the ebay/china boards only have the LED lights on the board - no additional components...
Just keep in mind some folks don't report having any problems but alot of others do. I most certainly did have trouble with RFI signals using the Command Electronics and LEDTRAILER LED lights. I also had several emails back and forth with Jason Weaver from Starlights, Inc. about their problems with the same RFI issues.
I'm sure I am abit more critical with these problems when camping off the power grid working with weak HDTV signals and sensitive radio units.
Roy Ken