It’s just the default PublicLab spectrometer kit. I haven’t even bothered upgrading its slit and recalibrating it yet.
For measuring white LEDs, it’s surprisingly sloppy. Mostly useless, actually. The spectral curve changes dramatically in response to even slight changes in angle or positioning. So, it’s more limited to measuring narrow-band light sources like a red LED, or finding narrow spikes within wide light sources like a CFL bulb.
I had hoped to be able to measure color temperature and CRI, but it’s nowhere even near accurate enough for that.
Some of my friends like there C8 and asked, if I could get some more power on these, but they prefer a long runtime on high.
Could anyone give me an advice, how much Ampere could be possible without killing the LED. Two wants a XM-L2, one friend a XP-G2.
Host: Convoy C8
Runtime: 20-25 minutes on high
LED: XM-L2 and XP-G2 on copperbase, dedomed
Which rate is conservative, which one risky.
At the moment they have alu based LEDs: XM-L2 U2 1A and XP-G2 R5 (maybe 1A). I will dedome these, too.
How much Ampere would be possible on these (for a runtime of 20-25 minutes on high)?
With a good battery( 25r, he2 or vtc5) you`ll be able with sqeeze 4,5 + amps from a U2 1A emitter on a Cu MCPCB and a fet driver, and yes its safe XPG2 you can drive safe enough up to 5.5amps
Using that setup the runtime would be arround 40-50 mins till the protections hits
Using this one for already 2 years, its quite reliable, user friendly and not that spendy as other pro spectrometers: it could be fount at a very reasonable price, its portable and quite easy to carry
Thank you Mitko. I got 4 LG HE2 a few days ago. Maybe I will buy a few XP-L high, instead of the XM-L2.
I will strip an old driver down, make it direct driven and try an Panasonic NCR 18650B and a HE2. If it takes 4-4,5A it's ok. If not, I will order new drivers, too.
Noticed this yesterday and was a little bit confused (know it from mtnelectronics for a higher price). After this I find the BLF "driver" thread with the posts of Toykeeper and others.
Now I have to wait, because it is out of stock, but this is ok, because copperbased LEDs are ordered, too (mtnelectronics is also out of stock).
Im loving my Thorfire C8 that I won a while back. This thread makes me want to mod it. Maybe Ill just get another host to mod. Which C8 hosts have the best heat sinking abilities? or are they all the same? If they are all the same Ill just get an Ultrafire C8 for about 9 bucks on amazon just to mod.
But…
Do I really need anything brighter living in the city? lol
It's all good and bad - good because of China pricing for parts/assembly/distribution, bad because of China quality (and availability apparently). For me, it's about even in cost of parts but I like my quality of build better. Anyway, this driver is obsolete the day it went up on their site - Tiny25 and Tiny85 based drivers is the way to go for TK's latest for Tiny25 power/tail switch lights (bistro), and my latest firmware for Tiny85 based drivers.
Flashlight Color: Black (Matt finished)
Emitter Brand/Type: Cree
Emitter BIN: XHP50.2
Color BIN: White 3000-6000K
Total Emitters: 1
Battery Configurations: 1 x 18650 rechargeable Ii-ion battery (not included)
Voltage Input: 3V - 4.2V max
Switch Type: Clicky
Switch Location: Tail Cap
Modes: 5
Mode Memory: Yes (Stay the current mode for more than 3 secs)
Mode Arrangement: Very Lo(5) > Lo (35) > Med(65) > Hi(100)
Hidden Strobe: Double click
Circuitry: Digital Regulated 3000mA Current Output
Brightness:
Runtime: Hi Mode: 40 to 50 mins (manufacturer rated)
Med Mode: 2 to 3 Hours
Lo Mode: +10 Hours
(Tested by KDLIGHT KB3500 3500mAh 18650 battery)
Lens: Multi-Layer Coating Glass Lens
Reflector: Aluminum Textured / SMO Reflector
Carrying Clip: -
Carrying Strap: Yes
Other Features: 1. Constant Current
2. Low Voltage Warning: It will keep flashing when the voltage is below 3V.
3. Waterproof Standard IPX-6 (Underwater 2m)
Dimension: 140mm (L) x 44mm (Dia. of Head) x 26mm (Dia. of Body)
Weight: 155g (not include battery)
Package Content: 1. 1 x KDLITKER C8.2 Flashlight (with package box)
2. 1 x Lanyard
3. Spare O-ring and Tail Cap
It’s hard to believe a stock light would do 2k lumens with no step down from a single 18650 - the kf8 kdiy is similar and was tested as being truthful. What’s the likely kcd on this?
Oh my!
Thanks for that tip, that looks like an interesting flashlight!
(and budget friendly)
Will it outthrow an xpl-hi with blf driver, or would the die be too large and be more a ‘flooder’?
