The lights make a mechanical impression of high quality, are extremely stable. They have fortunately only one switching stage, namely ON / OFF and not the rumgegurke with SOS and Strobe. They are also really bright, naturally not as bright as the (much larger) UltraFire XML-T6 or ThruNite TN12, but which are indeed also specified with the 3-6 times the light intensity.
And they fit in your pocket. I wonder how one can offer such lamps for 3 (including postage). I would give 6 stars, unfortunately you can not.
