kengps
Flashlight Enthusiast
I lost the dome on my Lumapower VX Ultra, and Lux went from 7900 to 11700. A bit more ringy than before but boy what a huge difference in throw. Anybody know if it's OK to run it without the dome in place?
SST-50 MUCH brighter without the dome.
- Thread starter kengps
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Chrontius
Flashlight Enthusiast
My Cree KL4 mod lost the dome, and it got crazy tight throwy.
The magic smoke comes out once it's been running for a minute or so.
The magic smoke comes out once it's been running for a minute or so.
f22shift
Flashlight Enthusiast
beamshots?
subscribed.
subscribed.
easilyled
Flashaholic
+1
Its calculated that total lumen output will drop about 30% with a dombless emitter. However it does allow the beam to shape into a tighter spot which improves throw (in other words it will give a higher lux reading)
Please tell me more.....
How or why does the lumen output increase when the dome is removed. At first glance this doesn't seem logical to me but perhaps there's an explanation.
kingofwylietx
Enlightened
I'm putting on my flame suite, I keep it handy since I'm still pretty new:
I have 3 questions that I think are relevent.
Why does a domeless emitter's total lumen output become reduced vs one with a dome?
Does the dome just focus light or does it also protect the emitter?
Can you glue a dome back on?
I have 3 questions that I think are relevent.
Why does a domeless emitter's total lumen output become reduced vs one with a dome?
Does the dome just focus light or does it also protect the emitter?
Can you glue a dome back on?
I think they are saying the total lumens decrease not increase when the dome is removed.Please tell me more.....
How or why does the lumen output increase when the dome is removed. At first glance this doesn't seem logical to me but perhaps there's an explanation.
Casebrius
Newly Enlightened
:naughty:
kengps
Flashlight Enthusiast
I took a closer look at it, and it does have a clear covering over the emitter surface. The dome seems to be a glued on lens of some type.
easilyled
Flashaholic
CPF'er saabluster has experimented in emitters without domes in this thread
You can see in post no. #4 that he says that the total lumens will drop by about 30% when the dome is removed.
The throw is often increased though.
For those that are curious as to reasons for this, read through the entire thread thoroughly
You can see in post no. #4 that he says that the total lumens will drop by about 30% when the dome is removed.
The throw is often increased though.
For those that are curious as to reasons for this, read through the entire thread thoroughly
CPF'er saabluster has experimented in emitters without domes in this thread
You can see in post no. #4 that he says that the total lumens will drop by about 30% when the dome is removed.
The throw is often increased though.
For those that are curious as to reasons for this, read through the entire thread thoroughly
Thanks, will do......
kingofwylietx
Enlightened
CPF'er saabluster has experimented in emitters without domes in this thread
You can see in post no. #4 that he says that the total lumens will drop by about 30% when the dome is removed.
The throw is often increased though.
For those that are curious as to reasons for this, read through the entire thread thoroughly
Nice thread, I read it too. It seems odd that today's leds are built in such a way as to need the dome. Hopefully that will change with time.
Locoboy5150
Flashlight Enthusiast
- Joined
- Nov 3, 2009
- Messages
- 1,102
I asked about that in this thread about when the dome fell off of my Cree XR-E:
http://www.candlepowerforums.com/vb/showthread.php?t=251476
It also was covered in this older thread:
http://www.candlepowerforums.com/vb/showthread.php?t=219489
kengps
Flashlight Enthusiast
well...I did much comparison testing and have concluded now it is not a good mod. It does increase throw but it still will not match an XR-E R2. And you lose so much overall output as to lose the SST-50's advantage in spread and sidespill. You get the same sidespill and less throw that an R2 with just a slightly larger hotspot. Not worth it.
easilyled
Flashaholic
You should also state in your other thread about the Tiablo SST-50 that you lose overall output.
At the moment you seem to be implying that you increase overall output in that thread. This is misleading and may encourage others to remove the domes and then to regret it.
kengps
Flashlight Enthusiast
I was referring to output compared to an XR-E. I fixed it to make it more clear.
I had a RCN3 laying around with a bad driver so I decided to mess with the dome on the Cree Q5 emitter. After I was able to remove the dome, the output dropped by about 40 to 50 percent. The hotspot was smaller but since the output dropped by so much I don't think throw was increased at all. From the looks of it I think the throw was less. I was able to just push the dome back on and it stayed on. After the putting the dome back on the output returned to normal. I am not sure how well the dome is secured though, I tried to shake it off but it didn't move. I think this mod is not worth it at all. I can't believe that the dome would help output so much.
