CNCman,
PWM and the duty cycle is baked into the firmware.
So unless you can get hold of the code and flash the driver you are stuck with the OEM settings.
In another thread TK told me that the 5K PWM at the lowest levels was to provide enough ” on time” pulse to light the LED.
I (think) I can detect PWM into 3K realms if the conditions are right.
Total dark and spinning fan blades that I can vary the RPMs.
5K and up and I’m good.
All the Best,
Jeff
Is it possible to modify a Halogen light bulb spotlight to use a XHP 70.2 led. I am concerned the reflector is not designed correctly for a led.
A good friend uses a cheap Q beam on his early morning fishing trips in his Bay boat to navigate to open waters. I thought maybe it could be improved since he is disappointed in its output. I wanted to dig into it since my operating table is vacant. 
Yeah, most likely the reflector is not shaped correctly for an LED. Think about where the light is being emitted in each case - and therefore where the reflector’s focal point should be. For an LED, it’s almost exactly at the bottom of the parabola. For a halogen bulb, it’s going to be some distance inside the reflector.
I have seen several Surefire lights that include a clip that makes it go bezel up when stored in pocket. What are the practical uses for such a configuration?
I know for some small lights you can clip to your hat and use as a pseudo headlamp but what of larger lights?
Do lighted forward clicky switches exist?
The lighting element and the switch are two separate pieces. So yes, you can mix and match to create a lighted forward clicky switch. As far as whether you can buy a pre-made lighted clicky switch, I don’t know. They’re not very common on factory lights.
At the time I ordered, CSLMN1.23 C8+ was out of stock, so I ordered a CSLNM1.TG C8+ 12 mode to swap the .23 into but I just learned the forward voltage is less for the red Osram. I’m new at doing swaps and figuring out drivers so what driver should I use in place of the 12 mode driver I ordered? I want to probably order stateside because I have a certain time frame in mind for a project (4th of July…). So which driver can I use turbo or 100% for a good bit without frying the red?
I’m not sure Simon uses different drivers for those LED’s, his drivers arent that sophisticated.
i think you should be fine, maybe a good google search will give both currents.
Thanks for your reply Jason!
I was looking for something “pre-made” as I don’t have the skills to do something joining pieces!!
Thanks for the reply and the quest continues
Simon offers a buck driver designed for red LEDs and single cell.
I am already 3 weeks into an order from Convoy and was trying to get on in 2 weeks.
This is a feasible driver correct:
Yes, that should work fine.
The Convoy 4x18a flashlight sbt90.2 can be purchased with or without its 18650 batteries,
I don’t know anything about the included batteries, and I am wondering if it would be worthwhile to purchase them separately for a performance standpoint?
It looks like Convoy is offering 4 of the Liitokala 3500mah cells for an extra $18. I’m not too familiar with that particular cell and I can’t find any reviews or tests on it. All I can say is it would fall in the “high capacity” style which looks like it would be fine for this light. Does anyone know the driver type of the SBT90.2 version? If its a FET driver you might be able to squeeze out some more lumens, but only when measured. Its doubtful you would see the difference with your eyes.
Those included cells should be fine.
Thank you for taking the time to reply, I will be ordering one for me and two as gifts it will make things a lot easier!
OK - i have a stupid question!
I feel like i should be able to understand this by now, but every time i think i do i realize i dont.
Regarding XHP35, XHP50.2 (NOT 3 volt), and XHP70.2
-Are they all both 6volt and 12volt, depending on how the LED's mcpcb is made? Or are xhp35 and xhp70.2 12 volt, and xhp50 6 volt?
The reason i'm confused (i feel compelled to explain) - i have asked Simon @ Convoy numerous questions about putting a xhp35 in a xhp50 (6 volt) light he offers on his page, or about putting an xhp50 in a xhp70.2 light he offers on his page, or any one of the combinations you could think of between these three LED's and all the awesome offerings h has for them.
Sometimes he says yes it can be done, and sometimes he says no it cannot. Just today he told me the xhp35 could not be put into the M3c-u light he has because there is only a driver for xhp70.2 so far. What does that mean? if they are the same voltage, would there be another reason they wouldn't be compatible? Could the amperage be too high for the xhp35?
Also, based off of Simon and my conversations, i was sure i knew that the xhp70.2 was a 12v LED< but then looking on his AliX store today ( i do this often) i found the LED offering for a "xhp70.2 6volt on 25mm mcpcb".
So now i am lost.
NOTE: * I am NOT blaming Simon for my confusion. I feel like if i actually spoke face to face with someone who knows this information, i would've understood it months ago, but sometimes with the "back and forth" of the computer, key info gets lost to my brain. thats a "me problem".
What volts are these LED's? Or is the voltage for these particular LED's determined by the mcpcb layout? (i feel like once u/cncman shared pictures with me of 12volt mcpcb's vs 6v mcpcb's.
Thanks!
The XHP35 is 12v only. I know the XHP70.2 can be 6v or 12v (depending on MCPCB) , and I’m not sure for the 50.
Page 28 of the XHP70.2’s datasheet ( https://cree-led.com/media/documents/ds-XHP702.pdf ) show this image of the bottom pad where you can see that the outside pads are split to allow for more than one configuration. This allows the XHP70.2 and the XHP50.2 to be configured as either 6v or 12v.
Page 35 of the XHP35.2’s datasheet ( https://cree-led.com/media/documents/datasheet-XHP35-2.pdf ) has the following image which shows that the same pads are solid which means it is a single configuration only, in this case 12v:
You’re right, the answer doesn’t specify why the driver would work with the 70 and not the 35 as it’s possible for a driver to work with both.
thank you!
Wow, thank you for this in depth look Marc E! I really appreciate it, this helps a lot. I have looked to the data sheets to find this information before, but admittedly never went to the "back end" of them (P.28) and looked, thats why i probably never found the information i was looking for. although if i did see the items you shared, i probably wouldn't of understood what they are depicting anyway, without an explanation like you provided. So, thank you very much!