If your in a really dark place outside you will be able to see its true power but it won't even come close to the throw of a T1/TK10/TK11. The effective range of the P7 light shown above is about 300 feet while the T1/TK10/TK11 is +750 feet. When up close and by celing bounce tests you can tell a big difference in output but actual use not so much.