1 watt led is 35 lumens.
IMO, 60 lumens is MINIMUM for any tactical use.
You want to be able to blind "the bad guy", see through shadows, etc., not give up your location.
I looked at it before settling on a Streamlight 135 lumen light.
It was 3x the price, but had 4x the output (135L)
More importantly was the issue of reliability when faced with a true life or death situation..., I did not want a light that may or may not work when needed most.
PS, I say this as a light collector. I have over 600 lights (compulsive? LOL!!) and when it comes to protecting family and home, it is best NOT to skimp on quality of a light.
What I mean is-
We buy the BEST gun we can afford (or at least what we "feel" is the best).
Then buy crazy high priced ammo (Hornady TAP or Critical Defense, Gold Dot, Hydroshock, etc, etc)
But skimp on accessories that "could" get us killed if they fail when needed. (scope, sights, lights, lasers, etc)
I say this by experience.
When you NEED your equipment, you do not want to worry IF it is going to work "this time".
This post is in NO WAY a put down, etc.
By all means, if that is the very best you can afford, that's cool, but if there is ANY way yo can get a higher quality light (or any other life saving devise for that matter), save, borrow or use credit to buy a higher quality tool and buy generic soda, chips and cereal.
I have had failures from "lesser" quality components, such as lasers, lights and scopes and ALWAYS when it is "needed"..., I mean, if it was not "needed", you would not have been using it.
For example-
Lasers that do not hold zero,
Lights that do not come on when needed (but work in the warm house just fine)
Just my .02 on the subject..., your opinion may be different and that's cool. Not to argue, just a different view to consider when picking items used for emergency use