V 1.5 lume test >>>
I charged mine up for @ 10 secs. under my desk lamp last night at @ 11pm.....Went to bed...discovered that my digital LED alarm clock wasn't working...
At my age, (70 today!!) one wakes up several times EVERY night for "bladder maintenance", and I always check out the time on my clock.Since it was off, I used my plopper as a substitute..
I'm pleased to observe that it maintained an easily legible degree of lume throughout the night, and was still quite bright at 7:00am...
My observation is that the watch develops a strong lume at first, then quickly loses maybe 1/3 of it in @ an hour, then stays quite bright all night...(8 hours in my case)...
IMNSFHO, spending any extra $$'s having these "frankenlumed" is a waste of money, unless you frequent the type of pubs that have gal's who are impressed by "wrist torches"!!
Here's mine after an @ 10 second chargeup under my desk lamp: