- May 19, 2019
Done this build quite some time ago, instead of doing a thread on it, I thought I would rather do a video, just to mix things up a little. It's just a simple video so yeah, please don't mind the lack of music and etc etc.
Overall verdict: I would still go for the NUGM03. Compared to the Nichia, this diode has a significantly higher Vf. In the datasheet its rated at 5.7V, whereas the NUGM03 is around 5V iirc. This means your driver has to be able to push high Vf, otherwise you might not get enough current through the sharp diode. Sadly, that is what happened in my case. Due to the space limitations of my heatsink, I could only use 17mm circular drivers, and yeah you guessed it, that means I used the cheapo chinese boost driver again. With that driver i only managed to push 1.0A through the diode, which gives me around 400mW of output. Still pretty bright though.
Given the relatively small difference in price between the sharp GH05C01A9G and the NUGM03, I would say that there is little benefit in choosing Sharp. Unless you absolutely need a canned diode and you are unwilling to decan the NUGM03.
Also, if P=VI, then the sharp diode also looks less efficient than the NUGM03.
Sharp: 5.7V*1.8A=10.26 watt power draw for 700mW output.
Nichia: 5V*1.8A=9 watt power draw for ~1000mW output.
With all that being said, I am still happy with the sharp diode, it has very good price/performance ratio. Just gotta make sure you pair it with a good boost driver.