Hi Jose,
The Seraph D36 head may or may not work on the FM "C" host... While the adapter will screw on to the head of the host, the D36 lamp assembly might not be able to make proper electrical contact. I have not had much luck using FM 18mm "C-C" bodies with the D36 adapter for 2 reasons:
1. The inside of the business end of the body is anodized (non-conductive) less that ring of non-anodized bare aluminum at the base of the lamp pocket. The outer spring of a D36 lamp is larger in diameter and doesn't seat all the way down into the head... This side of the problem can be solved with the outer spring stolen from a D26 incan lamp from LF. The larger outer spring will work on most SF bodies- even though it doesn't seat all the way down it doesn't mater because the lamp spring "pocket" of the body is not anodized on an SF body and will make contact anywhere.
2. The center spring doesn't extend far enough down into the body of the light to make contact with the cells on a body that has a "lip" that prevents cells from "sliding forward" to meet the spring. On an SF body with 17mm diameter cells, the cells can move forward past the "lip" for the large spring contact, on bodies bored fro 18mm cells, the larger cells won't slip forward far enough to meet the spring. The Seraph host solved this issue by making the lamp pocket on the body shallower and the D26 heads deeper. This side of the issue could probably be solved in several ways- Like stretching the center spring (I've done this, it works, do at your own risk and make sure to support the base of the spring against the lamp assembly while pulling so as not to rip it out of the base of the lamp)... Alternatively, some sort of magnet (a few mm thick would do the trick I think) with an insulating washer around it could be installed up there above the top cell to complete the circuit...
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325addict,
LumensFactory makes recommendations for battery and lamp combinations and maximum continuous runs that are purposely on the conservative side to minimize liability and maximize safety for customers. Most companies do this in some fashion or another. We can come along after the fact, dissect the products and decide how we want to use them and make our own informed decisions.
For years now, 18650 size protected lithium cobalt cells have been used here on CPF to drive lamps like the WA1111 (~3.5A), 64250 (~3.5A), WA1185 (~3.3A), ROP high (over 4 amps!).
The maximum recommended operating/exposure temperature is ~140F for most 3.7V li-ion cells whether they are LiMn or LiCo chemistry. The LiMn (IMR) chemistry would have a margin of safety from it's naturally safe chemistry; if the user were expecting to use the light in a manner that could on some occasions cause more heat build up than ideal, that safety margin might be preferred...
I will say this... LF doesn't make a lamp (IMR line included) that cannot be used safely on quality protected 18650s
Smaller cells like 18500s should be avoided for some of the lamps though. (Like the new IMR-9L and IMR-M3T).
The bulbs designs of the IMR lamps are optimized to handle the higher operating voltages that would be expected with IMR18650 cells. In my experience, a set of AW18650s looks just as bright to my eyes on the lighter duty lamps like the IMR-M3 and IMR-9. (there probably isn't enough difference to see). The noticeable difference in output kicks in on the higher current bulbs.... The IMR-13 would really be a toss-up. Make the decision based on what results you want from the light- IMR cells will deliver a flatter discharge, resulting in less noticeable decline in output through the discharge, but the total runtime probably won't be any better than 30 minutes. A set of AW 2600s would run for more like 45 minutes, but would have a more noticeable decline in output through the run.
I'm always amazed when I use my IMR18650s from Emoli on continuous runs in the M6 with higher powered lamps like the IMR-M3T/64250/MN21, I don't see hardly any difference through the run, then all of the sudden they "go-dead" and it's like a sudden drop-off in output sneaks up on you very fast.
" enough that I now only use the clicky.
