Bunsofham was kind enough to supply me with a Navy E07X through BST. It started life as an XP-L HI 5000k.
My goal though was to make a limen monster with good tint. My experiments with XHP50 were mostly a failure due to various degrees of Cree green…
Enter San’an. The SFx 5050 LEDs come in both 3000k 95 CRI variations and 6500k 70 CRI variations (technically more bins, but the ones easy to get on Kaidomain anyway). The 3000k generally has a banana tint that is unpleasant at worst and hideous at best. However, the 6500ks are usually clean white without the usual Cree green in them. What happens when you mix them? Magic. Somehow the result is good.
I tried a few mixes –
SFN40 – 4x 6500k and 3x 3000k – came out to 4500k and 80 CRI on BBL with nice tinr
SFQ65 – 3x 6500k and 4x 3000k – about 4800k and 80 CRI on BBL with nice rinr
SFQ55 – 4x 5500k and 3x 3000k – about 4700k and 75 CRI with unpleasant greenish brown tint… Bad enough that I won’t try to mix 5500k gain
What is weird is the SFN40 required more 6500ks than the SFQ65 to get in the 4500k range. I don’t know if it is because the SFN40 runs warmer CCT or the SFQ65 runs colder CCT, but in the end, both of those mixes still yielded a great result.
I had to use a KingBrite 25 degree optic to get cleaner beams due to the large emitting area of these LEDs (larger than even XHP50.3 HI). Too bad I didn’t get any SFQ55 in 6500k, because those have a bit smaller LED, but unsure the bins would be as good as from Kaidomain.
These are using custom E07X 5050 MCPCBs and custom AUX board (V2).
This SFN40 version seems to definitely produce more bright flood lumens than my SFT40 versions (4000k and 5000k), while having way better tint. Obviously not as throwy.
by fweep
