What I do like about LED's is how they will run anywhere, using portable, rechargeable batteries, without needing to be attached to an outlet. They are convenient, and efficient.
One of the drawbacks I see is that when you decide to change the batteries, on a cheap LED flashlight for example, sometimes they work afterwards, and sometimes they don't. Having to reassemble the flashlight to change a battery is a disadvantage. On other types of LED fixtures, where you only access the battery compartment, changing the batteries isn't a problem.
