Best reflector and LED combination for throw?

[PCC]

I was wondering what would be the best McGizmo reflector and LED combination would be for throw? I'm hoping to keep it to no more than a 27mm diameter reflector. Possible LEDs is open as it will be purchased specifically for this build. Thanks!

 

[loudscoutii]

What are you going to be using to power said LED? I have a 27lt that was modded with a K2 TFFC, and Flupic. It runs @ about 1.2A and throws really well. It is not the longest throwing light I have, but is an excellent compromise of overall beam quality, tint and run time. That deep reflector does a great job.

 

[PCC]

Let's just say that nothing has been bought for this project and that the possibilities are endless, hence the question. It confuses me that the McR27 throws better than the deeper McR27L.

 

[maxspeeds]

I don't own an McR27L, but the McR27 with xp-g throws really well for it's size!

 

[maxspeeds]

I forgot to mention that the McR27 is the baby brother to the McR38 and the McR27L is the bigger brother to the McR20. These two pairs of reflectors share the same focal lengths respectively.

 

[PCC]

I have a McR20 in a KL4 head in front of an XP-G and it throws a really nice beam.

I'm trying to put together a D26 drop-in with the best possible throw so it's going to have to be something that can be driven hard and throw, throw, throw!

 

[maxspeeds]

I think you may want to use the McR27L. See the first two links here (G2 & C2 build): http://www.google.com/search?q=Mcr27l&sitesearch=candlepowerforums.com

 

[PCC]

I received the McR27 and the McR27L the other day. Just looking at them I can tell that the "27L" is going to out throw the "27". Putting them in front of an XP-E the 27L gives me a nice, tight spot while the 27 gives me a blob of unfocused light. Shining a light into the reflector and pressing my finger into the center hole of the reflector from the back side shows that the focal point of the 27L reflector is just behind the end of the reflector while the focal point of the 27 is about 1-2mm inside of the reflector. This one appears to be a newer one that has the last step removed from around the hole and the hole in the reflector is really big, almost big enough to fit over the dome of a SSC P7. It's almost as if this one is an incandescent reflector. I haven't measured the diameter of the hole to see what it is but I'm going to guess that it's around 8mm. I'm going to play with these some more in the next few days.

 

[McGizmo]

The McR-27 was designed as an incan reflector originally. It was used in the Pelican M6 incandescent. It has a longer focal length that the McR 27L and will do a better job of collimating the light it does have effect on compared to the McR 27L but the McR-27L will manage more of the total light output from the LED. The focal point of the McR-27 is up inside of the reflector and you will need to either remove material from the back or elevate the LED into the reflector to get focal alignment.

 

[PCC]

Yes, that's what I've figured out. So, the McR27 has a longer focal length. Interesting.

 

[nfetterly]

DatiLED put an XP-G in my 27LT-S and boosted the amperage. Was a very good light before, with a really really nice beam but didn't get too much EDC time. Really rocks now. I need a holster for it though.....