[NED] Zebralight SC700 with 4500K dedomed XHP50.3 (not a typo)
by bob_mcbob
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4 Comments
This is a neat one. /u/m4potofu recently shared some 5050 to 3535 pad adapters he designed, and he was kind enough to draw up a 7070 to 5050 version so I could try XHP50.3 in a Zebralight SC700. The reflector isn’t quite optimized for an LED of this size, but the results are pretty nice, and it also allows some CCTs that are impossible to get with good tint in XHP70.3.
Using the pad adapters is an interesting process. The adapter is reflowed to the larger pads, then the centre well is filled with solder, and finally the LED is reflowed to the pad adapter. In the SC700 at least, everything stays nicely aligned if you’re careful. The pad adapters are Oshpark flex, which I believe is about 0.2mm thick. I wasn’t completely happy with the result after my first attempt, so I went back and physically held down the LED to get it as close as possible to the PCB while the solder solidified, which seemed to improve focus.
#Colour
The ~4500K dedomed XHP50.3 HI I used for this mod looks quite good, especially at higher levels. Nice tint throughout. This is an example of a CCT I can’t do with my current selection of XHP70.3.
Level | CCT | Duv | CRI (Ra) | CRI (R9)
—|—|—-|—-|—-
H1 | 4808K | -0.0019 | 90.8 | 71.0
M1 | 4411K | 0.0007 | 93.7 | 82.8
#Output and Throw
On H1 I measure ~2100 lumens at turn-on, which is about 30% lower than a stock SC700d, and around what I expect comparing datasheet luminous flux ratings for XHP70.2 and XHP50.3 HI. I measure 14.25 cd/lm, which is proportionally higher than stock (5.8 cd/lm) and XHP70.3 HI (10.7 cd/lm). Throw is about 346m, which is almost exactly the same as the lower intensity 5000K XHP70.3 HI, which gets there just by virtue of its higher output.
This goes a little above my head, but the output looks really nice! That is quite a hit to total lumens, though. Would be interesting to see this next to an SC600, just for comparison.
This is beautiful, sir.
I like it. I always thought the SC700 should offer a throwy version.