IMHO, LED's have a poor level of light output. They state they deliver lumens, but, my experience with them has shown different results.
I installed an LED in my shed, along side a halogen that is rated at half as many lumens.
The halogen far out performs the LED.
I have purchased several of those eBay 12 volt specials, and have tried them, they are all in the junk box.
I know we have to scrimp on amps, but, LED's do not seem to deliver.