Dereelight DBS V2 R2 - Donut Hole

[I came to the light...]

I have a donut hole too, despite FlashCrazy's replacement, and then another specially adjusted by him. However, it does not interfere with throw: the beam is amazingly ugly indoors, but the light is pretty much parallel at very long ranges. So at 1000 feet, there is no visible donut hole. I think this is normal, but increasing over distance is not.

 

[jblackwood]

Pabs, your hole looks much more pronounced than mine (I can't get the hang of taking pictures of lights). I made sure my pill was screwed in VERY tightly. There was a little force and I pushed beyond it and went a full 1.5 revolutions deeper. Maybe that helped? Either way, there's no way I'm fooling with it after seeing this thread!

 

[FlashCrazy]

The shadowy center is normal. Like mentioned before, you can back out the pill slightly to improve it, but the throw will go down. It's not only on the R2 emitters, the Q5's are the same way. It's just the nature of the beast when dealing with "super-thrower" reflector design. Theoretically a reflector focuses best at only one point in distance. When going for best focus at far distances, the short range focus will be less than ideal.

My Tiablo A10 has the same effect, so does my Raidfire Spear. The Spear is the least noticeable, but it also has a few thousand less lux. Backing out the pill on the DBS to achieve the Spear's hotspot appearance results in about the same lux reading as the Spear. Below are pics of the Tiablo A10's, and the DBS 3SM R2 WH's hotspots. They're different exposure values and other settings... I'm no camera expert, but I tried to match what I was seeing on my not-so-white wall.


Tiablo A10 R2

Dereelight DBS V3 (3SM R2 WH)

 

[Sgt. LED]

If the doughnut bothers you then try to fix it.

Screwing it out makes it worse eh'? OK take the emitter off of the pill put some Arctic Alumina behind it. Make the LED sit higher ontop of the pill so you have more thread length to work with during adjustment.

It's just a thought. I'd leave it alone and stick with max throw since that's the point of the lights design unless it's a really really big hole in the beam.

 

[Pabs D]

Pabs, your hole looks much more pronounced than mine (I can't get the hang of taking pictures of lights). I made sure my pill was screwed in VERY tightly. There was a little force and I pushed beyond it and went a full 1.5 revolutions deeper. Maybe that helped? Either way, there's no way I'm fooling with it after seeing this thread!

Really? The reason I said look to the side of the beam (to let your peripheral pick it up) is because it's hard to see the hole right off the bat, straight on...for me anyways. I could screw it in more but I don't want to strip the threads. It's in there tight.

Flashcrazy, thanks for the info and comparison. Where it counts (outdoors) it is negligible. I'll post outdoor pics when it's warmer.

 

[WadeF]

I wonder if there's something wrong with this batch of R2 WH pills. Anybody experience this in the R2 WC?

Why would the bin matter? R2 WH, R2 WC, Q5 WC, etc, are all Cree XR-E 7090 LED's. They are all the SAME emitter. The only difference is tint and efficiency.

There can be differences in each emitter as far as how it focuses, but it has nothing to do with the bin. You could have 5 R2 WC's and they could all slightly vary in how they focus.

 

[kindred_spirits]

I swapped the R2 1SM-2 pill with a 5A Q3 3SM pill. There is no donut hole at all with this pill.

 

[moffel]

I have a DBS with smo reflector and two pills, 3SD-Q5 and 1S5A-Q3 the first pill is fine but the Q3 have a big donut hole, say would a OP reflector solve the problem? i know that i will lose some intensity i the spot but i am fine with that.

 

[J.D.]

I have a DBS with smo reflector and two pills, 3SD-Q5 and 1S5A-Q3 the first pill is fine but the Q3 have a big donut hole, say would a OP reflector solve the problem? i know that i will lose some intensity i the spot but i am fine with that.

I've the same problem with some pills and the SMO reflector. with the OP no donut hole ate all...

 

[moffel]

I've the same problem with some pills and the SMO reflector. with the OP no donut hole ate all...

That sounds good! it seems like i have to get one OP reflector then.

 

[WadeF]

That sounds good! it seems like i have to get one OP reflector then.

The OP will clean up the beam, but you'll loose a lot of throw.

 

[moffel]

The OP will clean up the beam, but you'll loose a lot of throw.

I remember hearing somthing about 30% loss in throw with OP, it would be interesting to see the difference in meters/yards, lets say that the Q5 pill with SMO reflector reaches roughly 300m and its easy to spot human to at least 200m. Can i expect about 90m loss in throw with OP (roughly)?

 

[jenskh]

Earlier in this tread, I presented measurements of my DBS R2 WH with SMO and OP. I got 39 % less illuminance for the OP than the SMO.

The SMO gave a representative illuminance of about 32000 lux , while the OP gave 19550. The distances to 1 lux (about usable light for me), are 179 m for the SMO, and 140 m for OP. It is possible to se the light far longer tham this, but this is what I would define as throw distances.

 

[moffel]

Earlier in this tread, I presented measurements of my DBS R2 WH with SMO and OP. I got 39 % less illuminance for the OP than the SMO.

The SMO gave a representative illuminance of about 32000 lux , while the OP gave 19550. The distances to 1 lux (about usable light for me), are 179 m for the SMO, and 140 m for OP. It is possible to se the light far longer tham this, but this is what I would define as throw distances.

thx that gave me a better picture of what to expect, i think that i will be satisfied with the OP since i mostly use my DBS in the woods where there are few clearings/fields larger than 150 meters, but i will probably miss the throw sometimes.

 

[droeun]

My 3SD R2 WH has a donut hole - doesn't bother me though.