there are two types one is weakerAccording to this page it's only 40 lumens.
http://www.bikebling.com/Lezyne-Zec...c_feed&utm_campaign=comparison_shopping_feeds
EDIT: Same on Amazon and Lezyne's site--40 lumens blast strobe.
http://www.lezyne.com/product-led-sport-zectopro.php#.VUDsqUIm8qY