Im currently waiting on an order from LCK-LED for TIR’s to arrive, but it isnt looking to good. I may have to reorder from fasttech; if the other place doesnt delivers soon. In comparing the head sizes of this light to other similar 5 x XML versions or the SRK, the XY-600 is a great deal larger and should provide a much larger surface area for heat exchange. Relic successfully heavily modified the 5 XML version and it came out really well, but is limited by the heat it produces if ran in high mode. IMO, the SkyRay XY-600 is an excellent quality mod host if you were lucky enough to acquire a good example. Some were reported as having some fairly shoddy work & finish, so I guess I got lucky (mine is nearly flawless).
At the moment, mine puts out a ton of light in direct drive (no driver), but the horrible reflectors ate up at least half of the available lumens. In fact, its brighter with bare emitters than it was with the reflectors mounted. After experimenting with TIR’s and possibly other reflectors, I might upgrade the switch and feed wires to 20 gauge for a few more amps. I have XML2’s on 16mm stars on hand for replacement if necessary, but first I’ll wait to see how the TIR’s impact the tint of the stock emitters. If Im happy with the results, I’ll probably attempt a driver solution similar to the relic masterpiece I linked above.
I’ll update when the 10 degree TIR’s arrive but Im anticipating extremely good results (given what the MTBR guys say about them). IMO, dont be afraid to tear yours apart and experiment. You’d probably be hard pressed to create something worse than how it came delivered.