Any light beats no light, hands down....I used to carry a similar light, also with an "on" button, a very desirable feature. But I have since switched to a small AAA keychain light - with a small increase in bulk and weight, I have much greater capability (hiking all night if necessary.

Whatever flavor you choose, having some sort of EDC light makes a big difference. Right now, I am regularly passing out small AA lights to crew members who are occasionally digging in dark shadows - and this is within a fully lighted building.....