45 lumens from a 5mm led when driven by 3x LR41 cells? LR41 alkaline cells have very high internal resistance. An alkaline AAA with close to 1000mAh features ≈0.22Ω of IR with little use (Duracell Plus Power AAA at the ≈150mA x-axis point, 0.5 - 1A discharge curves). A cell with less than 1/30th of such capacity would have 7+Ω of internal resistance in the same conditions, which at 100mA of drain/driving current is a drop of 0.7+V for a single cell and 2.1+V for 3 cells in series, this means no chance of hard driving the emitter even with fairly new cells. According to these figures, those 45 lumens are a blatant exaggeration or typical false advertising.
The Red Cross Blackout Buddy emergency light (link to confirmation of modification), so you can have a warm white auto-on power outage light. Takes 3 emitters, I think.
The Red Cross Clipray is similar, but instead of a power outage light, it is a handcrank one that can run either lights, or supposedly charge USB devices (slowly).
The Coghlans dynamo flashlight is a very small crank light with 2 emitters. It seems like a good kids flashlight if it can hold up.
Received the package of 100.
There will not be a proper review until next tuesday (I will have enough forum chat time but there will be no hands-on cave time possible).
Quick first impression of one random led from the package:
*plenty bright
*very pleasant tint to look at
*very smooth broad beam (60 degrees from specs seem correct)
*edge of the beam a bit warmer than the rest (found it not disturbing)
*at ~20mA, middle of hotspot: 3325K, duv –0.0039, CRI=97.4, R9=88.