The Inova and the Surefire are not really comparable. They are used for different purposes. You would use the Inova as a task light or for short-range illumination. The Inova still has value as a signaling device since it can still be seen from a mile or so away. The Surefire is really for longer range illumination and for use with firearms. Given their battery life, I would not use a Surefire as an emergency light, except in cases where I would already be carrying a firearm, or couldn't carry flares. <br><br>That said, a Surefire is great to have for walking alone at night. The "dazzle" effect is good for deterring and/or escaping from attackers. Their new hybrid light should be very interesting.