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Paul_in_Maryland said:
You're not alone is wishing the Longbow series were offered with 3W heads.
Toward this end, I have good news and bad news.
First, the bad news: Longbow makes a 5W head for their 2AA tube, BUT you must use CR123 cells in the tube!
Now, the good news: For $90, you can buy a 3W McCapsule Light Engine for use in LongBow lights. See McGizmo: Custom Build Pricing and Ordering in the McGizmo thread.
If length is no concern, consider the $100 2AA Heliotek HTE-1, arguably the toughtest 2AA made.
By the way, what does BOB stand for?
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Are you sure about 123s fitting in the eco tube? 3 right? The length seems reasonable, but the width? Was the tube designed to be that way? I honestly have never seen one. Only own a micra.
Another vote for the Heliotek. Since it uses lithium AAs it wont let you down when you most need it; i.e., when you reach for the BOB. In addition, it has excellent throw, can be converted to a flood mode by simply flipping down the beam diffuser, and its 7 hour FULLY regulated runtime. Here is a review.
Heliotek HTE review at flashlightreviews.com