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| LED Modeling for AB/WL/VML http://www.paulcbuff-techforum.com/viewtopic.php?f=8&t=1389 |
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| Author: | Luap [ Thu Apr 21, 2011 9:45 pm ] |
| Post subject: | LED Modeling for AB/WL/VML |
Here's a link from David Hobby with 3W LED modeling lamp that fits AB. Could be great for a little bit of modeling when using VML, and should light for hours on end. Haven't found one to fit Einstein yet . . . but we do have a high brightness 35W quartz under evaluation for E640. http://strobist.blogspot.com/2011/02/fo ... -your.html |
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| Author: | Joseph S. Wisniewski [ Fri Apr 22, 2011 2:29 pm ] |
| Post subject: | Re: LED Modeling for AB/WL/VML |
Excellent. I'll have to give these a try. I've been looking for some lower heat output bulbs for the product table. Although Mr. Hobby has tasted a bit of the bulb-scammer's Kool-ade. LED bulbs get about 5x the lumens/watt of tungsten, not 10x. They're not magic. |
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| Author: | Luap [ Fri Apr 22, 2011 3:16 pm ] |
| Post subject: | Re: LED Modeling for AB/WL/VML |
You're right about efficacy. Standard tungsten bulb are typically 17 Lumens per Watt while most LEDs are around 50 L/W. LEDS in development have gone over 100 L/W but these are not common and are very expensive. Also, the higher the color temperature, the greater the efficacy because the emitted light covers a wider spectrum. But 7000°K light is unnatural for many, and the human eye falls off in sensitivity to the blue/magenta range, so some of the increased efficacy of "bluish" LEDS may not show up as increased visibility. Still, all in all, I believe LEDs will render CFI lamps obsolete a few years from now when cheaper brighter LEDs begin to reach maturity. One concern I have with LED modeling lamps is the flashtube can really get hot and could potentially overheat LEDs and cause failures. |
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| Author: | Liquid Rhino [ Tue Apr 26, 2011 10:58 am ] |
| Post subject: | Re: LED Modeling for AB/WL/VML |
I don't know the first thing about bulbs or bases, but might any of these offerings (same mfr. as your link) possibly work with einstein (JD250W/DC)? List of Ledtronic's DC based LED's (pricey!) http://www.ledtronics.com/Tools/IncandescentCross.aspx?filter_bulb_number=&filter_bulb_base=DC+Bayonet&filter_bulb_type=&filter_base_no=&filter_color=White http://www.ledtronics.com/Products/ProductsDetails.aspx?WP=C68K1150 |
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