I have always used a pocket pen light at work, I'm a mechanic. Recently I purchased a Streamlight Stylus Pro which is a somewhat fat pen light with a aluminum body that uses two AAA batteries. Holy cow this light is super bright. It's listed at 48 lumens and is supossed to be good for 6.25 hours on the included batteries. Now for the best part: I got mine for less than $22. That's with a discount that we get through my employer, I think the regular price is around $30. Also it's listed as water resistant but I have washed mine in the clothes washer by accident and it's still working great. I know it would be a great BP light.Not sure of the weight, but I'd guess 4-5oz.