I don't know about HID, but I believe bulb life is not virtually infinite like LED is b/c IIRC HID bulbs can be found for sale for lots of $$$. LED lifetimes tend to be something like 10,000 to 100,000 hours, although the Dinotte 5 W LED I believe has a much shorter lifetime due to its power (3W and less tend to have lifetimes of 10,000 hrs plus).