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Firemedic262
Newly Enlightened
Re: Destructive Incan Bulb Tests - Updated 1/7/08 (Info Added)
And the great work cont. :thumbsup:
And the great work cont. :thumbsup:
Understood, Lux; it makes more sense to settle doen to do a decent test session in one hit.I was kind of stalling when I got a note that Litho123 was sending me a bunch of new bulbs to test, which I just got yesterday...so now I will get these all caught up and tested soon.
[LuxLuthor said:Don't use the Lumens that appear on my spreadsheets, as they are only determined by the AWR Hotrater spreadsheet, which is not very accurate. I think a better way to estimate lumens in most cases, is using the manufacturer default voltage/lumens and show an increase in that starting lumen value--in direct proportion to my actual Lux measurements. This is an answer I gave to another member which I think gives the answer. I will eventually setup this calculation as another column when I post latest bulb tests shortly.
I think the most accurate way to figure out lumens is to look at the destructive test thread I did. In particular the chart for the 64625 bulb:
I know my Lux measurements were accurate, as I repeated them at least twice for all the bulbs on this thread. I also know that projections for Osram Lumens using AWR's Hotrater spreadsheet were overblown, so you cannot use those higher values.
So if we assume that Osram's published lumen estimate at default is accurate, then we can cross compare that to my actual Lux measurements when overdriven, and set up a simple algebra equation, and solve for "x lumens"
If at default 12V, Osram says this bulb has 3,600 (bulb) lumens, and I measured 395 Lux. If we look at higher voltage of 13V it gives Lux measurement of 475, which we use to setup equation:
3600 Lumen / 395 Lux = X Lumen / 475 Lux
To solve for X, you 'cross multiply' to get:
3600 x 475 = X x 395
Solve for X:
1710000 / 395
= 4,329 (Bulb) Lumens
Now, that assumes the voltage at that one value, even though without regulation, the battery voltage starts high, and drops over run time.
Anyone have a good source to purchase the 64447, bulb connection does not seem to carry them?
Thanks in advance. Perhaps I should change my handle to "Question Man"
Lux
I have two WA1160 bulbs that everyone uses in the MagChargers if you don't have those I can send.
Lips