What I like about this build, is how cheap the build is ($2-3 dollars in parts). I have seen some cheap LED lights like this around $10 and up, cheapest was $5. This could be a nice way to update some existing spot lights on the cheap.
https://www.instructables.com/id/Retrofit-a-Incandescent-500W-to-50W-LED-Flood-Ligh/