Runtime graph request - 2D household light

[paulr]

Roy, or anyone else who does runtime graphs:

Sometime could someone do a runtime graph on a traditional 2D household flashlight (or 2D Mag, pretty much the same thing) with a stock PR-2 bulb and generic alkaline D cells? A second graph with so-called "heavy duty" (zinc chloride) cells would also be nice.

I don't have a burning desire for the info and there's no hurry for it, but this is probably the most popular type of flashlight in the whole universe, so the CPF runtime graphs collection seems incomplete without it.

 

[Big_Ed]

That's a good point, plus it would give a benchmark for everyone to compare the newer, hi-tech lights we all have now. It would help illustrate the improvements flashlight technology has made in the last 10 years. Maybe include different bulbs, from standard vacuum, to krypton, halogen, and xenon, so we could see the improvement each step has made.

 

[Roy]

I would but............I've modded all of my 2xD Mags! /ubbthreads/images/graemlins/tongue.gif

I did do runtime plots on stock 2xAA and 2xAAA MiniMags

I'll go get one of the cheap Everready 2D packs ...the kind that come with batteries.

 

[Big_Ed]

Good idea, Roy! That's a flashlight that most households have laying around.

 

[Rebus]

I'm afraid the baseline flashlight
today is a 2D running alkalines and
using a krypton bulb.

However a comparison of all three
of these would be interesting.

-Rebus

 

[Big_Ed]

The cheapie Eveready has standard vacuum bulb, not a krypton.

 

[Rebus]

[ QUOTE ]
Big_Ed said:
The cheapie Eveready has standard vacuum bulb, not a krypton.

[/ QUOTE ]

That may be true, but I would bet that most households
are using the next step up light that has a krypton
bulb. One reason being that when you buy a flashlight
you usually have maybe 1 or 2 Pr-2 lights to chose from
at $1.50 to $3.00 and about 6 or 7 KPR102 lights starting
at $4.00. Most people see Brighter krypton bulb on
the label and decide it must be worth a few extra bucks.
If this is not the case, none of the marketing strategies
are working and the flashlight companies are going broke.
That at least is what is probably happening in the Wally-World dominated 1st world.

-Rebus

 

[paulr]

I'm more interested in the shape of the graph than the absolute brightness. But yeah, if the KPR2 bulb is as common as the PR2, then it's perfectly reasonable to test it instead.

 

[Roy]

Untill I came along with my modded AA MiniMags, every flash light that my Dad had was straight, out-of-the-box origional. I'm not even sure that the batteries had been changed.

 

[paulr]

Bttt. If someone has the equipment to do a graph, I have a cheapo plastic light I can send. I don't really need it back.