500m is really, really far away. Without binoculars you won’t be able to see that far with a light, since it creates a beam which pretty much covers everything once you get out to the 500m mark.
But here are some pics of cheap eBay/Aliexpress HIDs which work pretty well.
HID smashes TK70: Ebay/Aliexpress 65W HID vs Fenix TK70 (new 75W model available now)
HID smashes sipik: Got my first HID (beamshots added)
There was also another thread that I saw which had more shots but I can’t see to find it anymore…