Hi,
In the moment I read a lot of the power of the seoul P4 LED over a Cree XR-E. I woundered what´s the truth behind that. So I tried both with comparable reflectors with an astonishing result.
I had some XR-E P4 in stock with (only) around 85lm/W while the P4 is the best binning with 100lm/W claim. The reflector I used is in both cases a McR-27 (special XR-E and P4 version) that should get the best out of both emitters. Both reflectors have nearly the same heigth, so they should be able the catch the same angle of light.
The image/hotspot I got with both are nearly the same regarding the size of the hotspot. But what´s abount the more interesting lux measures?
Well the old XR-E P4 binning gets up to 7.900 lux. Now I tried the seoul P4 with its reflector friendly beam pattern and like everybody I expected some more lux on the clock.... but nada.
The seoul P4 with its 100lm/W on paper achieves the SAME lux measument from around 7.900 lux BUT with less sidespill (of course). :thumbsdow
Besides that the seoul look clearly more blueish at 1Amp with poorer color redering.
Are there others out there that can confirm that observeration and share their results with a McR-27? For me a Seoul P4 looks like a poor choice if you HAVE one ;-)
greets
MikeRD03
In the moment I read a lot of the power of the seoul P4 LED over a Cree XR-E. I woundered what´s the truth behind that. So I tried both with comparable reflectors with an astonishing result.
I had some XR-E P4 in stock with (only) around 85lm/W while the P4 is the best binning with 100lm/W claim. The reflector I used is in both cases a McR-27 (special XR-E and P4 version) that should get the best out of both emitters. Both reflectors have nearly the same heigth, so they should be able the catch the same angle of light.
The image/hotspot I got with both are nearly the same regarding the size of the hotspot. But what´s abount the more interesting lux measures?
Well the old XR-E P4 binning gets up to 7.900 lux. Now I tried the seoul P4 with its reflector friendly beam pattern and like everybody I expected some more lux on the clock.... but nada.
The seoul P4 with its 100lm/W on paper achieves the SAME lux measument from around 7.900 lux BUT with less sidespill (of course). :thumbsdow
Besides that the seoul look clearly more blueish at 1Amp with poorer color redering.
Are there others out there that can confirm that observeration and share their results with a McR-27? For me a Seoul P4 looks like a poor choice if you HAVE one ;-)
![Anyone :anyone: :anyone:](/styles/default/xenforo/smilies/2/anyone.gif)
greets
MikeRD03