Various lights with lumen estimates

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brted
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I took what was on the Google spreadsheet, added some formatting codes and produced a sortable Wiki table on the flashlight wiki here:

http://flashlight-wiki.com/Budget_light_output

I'll need to do periodic updates as Don gets new data, but it isn't really hard, just a find and replace for the tabs and new lines.

sb56637
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Very nice brted, thanks!

Suggestion: Could you just embed Don's spreadsheet into the wiki page, possibly using these instructions?

Cheers.

Budget Light Forum ...where Frugal meets with Flashlight!

brted
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Their example spreadsheet is pretty tiny, but it doesn't look like it is set up to let you sort the information by the headings like the sortable wiki table is. I like having the ability to sort the table, but in order to make the table fit the page I had to leave out a lot of infomation in the spreadsheet (like the product links). If you want all of the information it is best to go to the source. I can add some explanation about that.

sixty545
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Don, I have a proposition for a new column in your spreadsheets. I found some interesting numbers trying to calculate overall efficiency for a light.

In all simplicity you just divide the calculated Lumen value with the current draw and the voltage of the strained battery (I used a typical voltage value).

My numbers fall between 16 and 64 Lumen pr. Watt and give a new comparison viewpoint.

Don
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sixty545 wrote:

Don, I have a proposition for a new column in your spreadsheets. I found some interesting numbers trying to calculate overall efficiency for a light.

In all simplicity you just divide the calculated Lumen value with the current draw and the voltage of the strained battery (I used a typical voltage value).

My numbers fall between 16 and 64 Lumen pr. Watt and give a new comparison viewpoint.

 

Makes sense!

Lumens/watt sounds useful.

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

Don
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I've added some NiZn results to the spreadsheet. Now recharging them so they all start on a level playing field.

I don't think the Powerlight can really handle the voltage, it was getting awfully blue but there appears to have been no permanent harm done.

Do NOT try these in an EastwardYJ J09 - mine was drawing over 4.3A with a freshly charged NiZn and would not have lasted long at that current draw - they really mean it about 1.5V maximum which is why it is so bright with NiMH/alkalines.

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

how2
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Tank007 wrote:

Smilewww.tank007.com is welcome for your visits

www.tank007store.com where you will find surprise Smile

Your prices are far too expensive

JohnnyMac
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how2 wrote:

Tank007 wrote:

Smilewww.tank007.com is welcome for your visits

www.tank007store.com where you will find surprise Smile

Your prices are far too expensive

More like "out of your mind" expensive. For those prices I'd expect quality batteries and a charger along with free overnight delivery.
JohnnyMac
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$50.55 for a light I can get almost anywhere for under $20 and as low as $16.50??

Yeah...Good luck with that. Money mouth

DrJones
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I did some measurements on some XM-L lights here.

The ceiling bounce value is a lumens estimate. 

Note that the page contains referral links; if you are uncomfortable with that, copy&paste the links omitting the referral part ("~r=..." or "?rp=...") at the end.

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