LED + holder + optic: which combinations?

[Cemoi]

I want to buy a red-orange LED and a white LED (star or round PCB mounted) with the associated (oval beam) lenses and holders, to DIY head and tail bike lights.

As far as I understand:

• The Fraen lenses and holders are designed for Luxeon LEDs, but can also be used on Seoul Z-power LEDs
• The L2 lenses and holders are also designed for Luxeons, and work with Seoul. But there is a different model for Luxeon I and III on one hand, and Luxeon K2 on the other hand. Which one fits on Seoul?
• L2 also has a model that fits on the Cree XR-E (Q5 and R2)

Is this correct?
Which other "LED+holder+optic+lens" combinations can be used?

Also, is there a place where I can buy the whole set?

• DX sells the white Cree XR-E Q5 and R2 at a good price with no extra shipping fee, but apparently doesn't carry the lenses.
• LEDsupply has a wide variety of optics, red-orange Luxeon I and III, but no Cree XR-E Q5 nor R2. Their shipping fee is OK for the US, but expensive for overseas.
• The Luxeon store has the red-orange Luxeon I and III (of course) and Fraen and L2 optics, and their shipping fees to the US and international are both low. But I'll have to order the white LED somewhere else as the Luxeon don't seem to be the best lm/W wise.

Any other suggestion for a supplier?

 

[LukeA]

A Cree and a narrow optic with scotch tape applied vertically over the final surface will give you an oval beam and will be pure flood

DX has a narrow optic to which scotch tape can be suitably applied.

 

[Doh!Nut]

I have not managed to get an simple solution to the above.
The obvious aim is to get the optic placed just above the body of the emitter.
The holders can vary in two ways,
1 the height
2 the base shape to fit around the LED. eg the K2 holder is simply a square hole to match the shape of the body.

Unfortunately the Lux data sheets do not give the height of the LED body so it is hard to compare, from memory the Lux5 holder is the closest to the seuol but certainly most of my holders for Lux1/Prolight are too low and the optic hits the LED before the holder touches the board. The solution is to glue some plastic on the bottom of the holder, but thats not the answer you were looking for and does not tell you how thick the plastic should be to get the advertised optic angle

I do have an example of each LED at home, I really ought to try and measure them, will try tonight but dont hold your breath.

 

[Cemoi]

the base shape to fit around the LED. eg the K2 holder is simply a square hole to match the shape of the body.

I suppose you refer to the body of the LED, but the holder should also have enough clearance so that the wires soldered on the star do not interfere with the holder.
I assume it is the case for the L2 holders whose datasheet says they are designed for use with the Luxeon Star.
The Fraen lenses with support seem to fit as well.

But it is not clear to me if the L2 OPTX-1 base module fits on a star-mounted Cree, or only on a bare emitter directly placed on the PCB.

Re. the Seoul LEDs: are there any optic holders specially designed for this LED? Seoul is not listed on the L2 products page.

 

[znomit]

But it is not clear to me if the L2 OPTX-1 base module fits on a star-mounted Cree, or only on a bare emitter directly placed on the PCB.

The base of the optic obscures the terminal pads on the usual 4 pad stars. If you have stars with six pads they work nicely... pads need to be adjacent to the led as that is where the gaps in the base are. You can grind away the part of the base that obscures the pad. Build details here.

 

[Cemoi]

If you have stars with six pads they work nicely...

So they wil fit on the Cree P4 Star or on the Cree Q2 star, but not on the Cree Q5 star nor on the Cree R2 star, correct?
Are there no optics designed to fit on these four pad stars?

 

[Cemoi]

The base of the optic obscures the terminal pads on the usual 4 pad stars. If you have stars with six pads they work nicely...

The Fraen FC series seem to be designed specially for the six pad stars, see on page 6 of their datasheet.
But I couldn't find a place to order them, any suggestion would be welcome.