The HL50 looks like an excellent primary headlamp, with the new virtually standard variable light levels, and plenty of lumens at the top end. I bought the hL10 primarily as a key chain ight, an essential part of my EDC, but it is nice that it can function as a headlamp, if necessary. I usually carry a headlamp on outdoor excursions, but more than one is not a bad idea. When caving, I adhere to the doctrine of at least three independent sources of light and that is not a bad idea for any outdoor trip, except possibly for Alaska right now.

I note that the HL50 weighs 0.6 of an ounce more than the HL-10. Can you handle that burden?

Actually, I bought the HL10 because the light blue head band complements my eye color perfectly. After all, we mustn't forget that we are civilized...
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Geezer in Chief