The LD20 is a relatively big flashlight for lightweight backpacking. Great for navigating off-trail in the dark maybe but unless you're doing that, it's overkill. You could save several ounces with a smaller light. I know it's just a few ounces but a few here and a few there soon add up to pounds.
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If you only travel on sunny days you will never reach your destination.*

* May not apply at certain latitudes in Canada and elsewhere.