Pros:

Bit more realistic in dark areas.
Blue outline reminds of led flashlights I use for camping...
Encourages you to switch light on and off depending on lighting or time of day

Cons:

Blue Outline may annoy some

Conclusion:

Without doubt a useful addition to my add-ons folder, Makes you use it properly unlike the origiinal which tends to be left on all the time barring witches..