Luxeon domes...can someone explain the difference?
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Re: Luxeon domes...can someone explain the differe
HD = high dome = whiter hotspot = furthest throw
LD = low dome = more side spill
SE = side emitter = reasonable throw and side spill
placement of the LS in relation to the reflector/optics can aid/restrict the light output. buy a few and have a play /ubbthreads/images/graemlins/smile.gif
HD = high dome = whiter hotspot = furthest throw
LD = low dome = more side spill
SE = side emitter = reasonable throw and side spill
placement of the LS in relation to the reflector/optics can aid/restrict the light output. buy a few and have a play /ubbthreads/images/graemlins/smile.gif
treek13
Flashlight Enthusiast
For information on high domes vs. low domes, check the Arc Flashlight FAQ.
About three quarters of the page down, you will find the "High Dome vs Low Dome" section which has useful information and some more links on the subject.
Hope this helps,
Pat
About three quarters of the page down, you will find the "High Dome vs Low Dome" section which has useful information and some more links on the subject.
Hope this helps,
Pat
Re: Luxeon domes...can someone explain the differe
lambertian = high dome (looks like a semi spherical clear dome, ie rounded)
batwing = low dome (as per above but it is cut off roughly half way down from the top of the sphere, the top of the lens is "flatter")
H
lambertian = high dome (looks like a semi spherical clear dome, ie rounded)
batwing = low dome (as per above but it is cut off roughly half way down from the top of the sphere, the top of the lens is "flatter")
H
FC.
Flashlight Enthusiast
Re: Luxeon domes...can someone explain the differe
SE does not have any "throw". It must be mated to a reflector.
SE does not have any "throw". It must be mated to a reflector.
Darell
Flashaholic
Re: Luxeon domes...can someone explain the differe
Yup. SE's, by definition, don't throw much out the front.
Yup. SE's, by definition, don't throw much out the front.
Re: Luxeon domes...can someone explain the differe
That's interesting... I have seen a 5W HD compared with a 5W SE in a Mag reflector. The HD had a definate advantage in throw when focused tightly. However the SE was not very far behind in terms of throw!! It does also have a wider side spill.
Darell: Sure, by definition, the SE's light is concentrated at the sides. Also the optics on it are designed that way... but when used with a reflector, the light from the side can be focused forwards?
FC, yes, mated to reflector, it is very useful. /ubbthreads/images/graemlins/smile.gif
That's interesting... I have seen a 5W HD compared with a 5W SE in a Mag reflector. The HD had a definate advantage in throw when focused tightly. However the SE was not very far behind in terms of throw!! It does also have a wider side spill.
Darell: Sure, by definition, the SE's light is concentrated at the sides. Also the optics on it are designed that way... but when used with a reflector, the light from the side can be focused forwards?
FC, yes, mated to reflector, it is very useful. /ubbthreads/images/graemlins/smile.gif
Chief_Wiggum
Enlightened
Re: Luxeon domes...can someone explain the differe
One thing about the high dome is that the hotspot is characteristically square and you can usually see the filament?? wires in the beam.
One thing about the high dome is that the hotspot is characteristically square and you can usually see the filament?? wires in the beam.
Rothrandir
Flashaholic
Re: Luxeon domes...can someone explain the differe
depending on how it's colminated.
also, i don't belive anyone has mentioned that the hd uses a different phosper-applying process than the ld, which makes it whiter and brighter. it's part of the reason you get a square beam.
does anyone know if this new process is used on the se's? one batch of se's i got was so insanely white...makes me think so.
for that matter...why isn't it used on the lowdomes?
depending on how it's colminated.
also, i don't belive anyone has mentioned that the hd uses a different phosper-applying process than the ld, which makes it whiter and brighter. it's part of the reason you get a square beam.
does anyone know if this new process is used on the se's? one batch of se's i got was so insanely white...makes me think so.
for that matter...why isn't it used on the lowdomes?
Re: Luxeon domes...can someone explain the differe
The SEs are usually pretty white, but they aren't as intense as the HDs. Even if they had the EOS phosphor application, they would then lose some lux to the funky triangle atop of their dome. The one thing the SE does have over the HD from the few mag-based 5W LSs I have, is that the SE, at perfect focus, produces a perfect, even, circular corona beam, while the HD has "moon crescent" patterns in its hotspot (best way I can describe the swipes of light right at the hotspot)...
The SEs are usually pretty white, but they aren't as intense as the HDs. Even if they had the EOS phosphor application, they would then lose some lux to the funky triangle atop of their dome. The one thing the SE does have over the HD from the few mag-based 5W LSs I have, is that the SE, at perfect focus, produces a perfect, even, circular corona beam, while the HD has "moon crescent" patterns in its hotspot (best way I can describe the swipes of light right at the hotspot)...
Rothrandir
Flashaholic
Re: Luxeon domes...can someone explain the differe
yes, se's aren't as effecient in directing their beam in the way their name implies as the hd is in spreding it's beam, but due to the fact that the ones (very few i'll admit...) i've seen were freakishly white. i would attribuite this to the new coating technique.
yes, se's aren't as effecient in directing their beam in the way their name implies as the hd is in spreding it's beam, but due to the fact that the ones (very few i'll admit...) i've seen were freakishly white. i would attribuite this to the new coating technique.
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