I've just Googled the Litt Industries one. Not a huge amount of info on their site about it. Not sure what LED it is using.
It looks ok, but you can get similar drop-ins cheaper most likely.
This the one The Torch Site in the UK currently sell, looks quite a similar design:
This one uses an XP-G2 LED. Which means you'll get more throw than a bigger LED. But the spill beam will be less bright and the hot spot still fairly narrow. i.e. it'll be true to the incan beam profile. Just much better.
The Torch Site only rate theirs at 300 lumen. I wonder if the 600 lumen claim is unlikely or degrades as it heats up. There isn't much heat management for 600 lumens IMO.
The drop in above is £11.95 in the UK. Which I appreciate would likely cost to ship to the USA. But does make the Litt one look at tad pricey.
If I was spending more (which) I did.
I'd get one of these.
They are £28.95 in the UK. But rated at 1000 lumens (800 lumen OTF). They are also 3 mode. You loose the focusing ability, but the focus is set to default. But you have way better heat management with these. So they can handle the higher lumens no problem. The LED is an XM-L2 which is bigger. This gives a fatter brighter beam and brighter spill. It isn't quite as throwy in profile, but the output means it'll throw very well still, but a lot more light overall.