Once again, Thanks for the great reviews! <br><br>I was interested since I just purchased 3 different LED lights. You reviewed two of the three. One you liked, one you dismissed due to no permanent off/on switch. I found the information about having to match the LEDs and the variable brightness very enlightening. <br><br>I compared the light output of my Pelican LI to my Princeton Tec MATRIX 3 LED headlamp. The single LED Pelican was brighter than the 3 LED Princeton Matrix. I had put this down to focus beam and diffused beam patterns. My test was simply to turn them both on and aim them at the wall 6 feet away. The LI created a white spot on top of the Matrix light spot.<br><br>The Matrix got my attention for several reasons. It claims to be waterproof to 2000 ft. It uses 2 AA batteries that are commonly available. (The store did a good job and put a two pack of lithium cells next to the flashlight.) It has an interchangeable light assembly. The 3 LED assembly is the same shape and size as their normal reflector and incandescent bulbs. The Matrix comes with the LED assembly installed in the flashlight and a normal reflector and bulb in the fleece carrying bag. You can easily exchange the LED assembly for the normal reflector and incandescent bulb in under a minute. The assemblies have a slot that fits a ridge in the body of the light to act as a key mechanism for proper alignment and polarity.<br><br>The 3 LED assembly is available as a replacement part for most of the Princeton Tec headlamps for about $32. Awfully pricey for a "bulb" but it allows you to upgrade your existing Princeton equipment from incandscent to LED technology.<br><br>The flashlight is hinged to the headband so the entire flashlight can be adjusted so the light shines where you want it. I bought this headlamp to replace my existing Petzel headlamp. I like the Princeton Tec LED Matrix because it is waterproof. As a member of a rescue team involved in water rescue and wilderness search, the durability, long battery life, light weight, and waterproofness were important features for me.<br><br>I had gone to the store to buy the Petzel Tikka but the store was out of stock. They encouraged me to buy the Petzel Zipka which is the same body but instead of an elastic band, it has a draw string cord. The selling point is it can be worn like bracelet or arm band as well as a head lamp. $35 for the Tikka and $45 for the Zipka. I could not understand the hard sell since they had neither in stock!<br><br>The Matrix is slightly heavier and bulkier than the Zipka/Tikka since it has a second band that goes over the top of the head, but it does allow me to switch back to incandescent lighting easily. There are times that I anticipate needing/wanting the brighter conventional lighting during SAR and night operations. I will be taking it out for a test this weekend during SAR/Survival training. Several other rescue team members have the Tikka so I will be interested to see how the two compare side by side.<br><br><P ID="edit"><FONT SIZE=-1><EM>Edited by resqman on 06/14/01 08:18 AM (server time).</EM></FONT></P>