2025-02-17
- Type: multi-die, domeless
- Bin: —
- Color group: — (5000 K)
- CRI: 90
- Rated voltage: 3 V
- Max. Forward current: ---- mA
- Max. Peak current: — mA
- Viewing angle: — °
- Thermal resistance: — K/W
- Max. Temperature Tj: max. —°C
I received this LED from BLF user @yoelpez in mid-February 2025. Many thanks for this at this point and the opportunity to test such an LED for the first time!
This LED was customized and ordered in China by flashlight enthusiasts. This is a relatively new trend that has so far only been present in China. Some background information can be found here. It should be noted that apart from the type and manufacturer, no information is available on this emitter. An official data sheet is not known, although in China this must be explicitly stated as a customer request when ordering a custom LED and is therefore not available for most Chinese LEDs.
The manufacturer “Hopthink” is also known in China as HSXLED.
This LED is visually similar to a Cree XHP50.3 HI and has the same basic design. The biggest difference here is the completely phosphor-coated top surface. The four individual LED chips are arranged symmetrically on the grey substrate. The silicon layer on top feels very solid and seems to be brittle. So handling must be done very carefully to avoid any damaging of the LED.
The footprint of the FL5009R is compatible with standard 5050 boards. When using LED boards for 12 V-XHP50, the forward voltage of the FL5009R can be raised to 6 V. Here it is tested in a 3 V configuration (standard 5050 board).
The cut-out corners in the contacts indicate the side of the cathode.
The illuminated area is 11.8 mm2 in size. However, due to the light emitted from the side and the gaps between the individual LED chips, it is almost impossible to determine the exact illuminated area. The FL5009R is also equivalent to the XHP50.3 HI in this respect.
- Maximum reached at 20 A, at this point 3564 lm @ 3.77 V
- Power at maximum 75.4 W
- Efficiency at maximum 47.2 lm/W
Data for 25 °C Tsp (at 85 °C the luminance values are around 13 % lower).
As no information on the maximum current is available, only the maximum possible current and the characteristic curve are used for the evaluation here. The efficiency of the FL5009R is generally quite high and is pretty much on a par with an XHP50.3 HI 90 CRI in bin H2. This is mainly due to the relatively low Vf.
It should be noted that the XHP50.3 HI shown here was damaged during the luminous flux test (burnt surface, see also here) and therefore did not reach its maximum possible output.
The 7070 LEDs completely pull away due to the lower thermal resistance, the larger chips and the color rendering indices (shown here for the XHP70.3 HI). Even the FFL707A achieves a luminous flux that is over 25 % higher despite its high color rendering index.
The luminance is in the mid-range. This LED is not a thoroughbred thrower with normal reflector sizes. Lamps with this LED are more like a throwy all-rounder.
The beam is fine in OP reflectors. There are no disturbing color fringes around the spot. Depending on the texturing of the reflector, there may be a slightly yellowish spot. This is probably due to the uneven phosphor coating or the gaps between the chips, which can be seen on the LES with low current at closer look.
However, this is all the more noticeable with SMO reflectors (see picture); a strongly yellowish spot is also clearly visible on uneven surfaces. This LED is therefore not recommended for lamps with SMO reflectors.
The light color is excellent. With a duv of -0.0022, the FL5009R tested here has a very slightly rosy tint that is never distracting. The CRI is high at 94 and the R9 is very high at 99 (!). This tint is almost perfect.
The CCT is generally quite high, so the FL5009R is only suitable for applications with cool white light. The light is similar to that of a Nichia 519A 5700K 90 CRI.
- Ra: 94
- R9: 99
- CCT: 5919 K
- duv: -0.0022
Custom LEDs designed by flashlight enthusiasts from China are still a fairly new development. All the more interesting to be able to test such an LED. All in all, the FL5009R is a very interesting LED and does a lot of things right. It is efficient, has standard footprint, offers a great light color and can be overdriven fairly well.
Only the beam in SMO reflectors could be improved, although this is not a problem in OP reflectors. Nevertheless, customizing LEDs and ordering them is an extremely interesting development that should produce many more interesting emitters in the future. Unfortunately, such LEDs are practically not available in the West, which is primarily due to the low number of units and lack of sales platforms/shops in the West.
Thank you for reading this test. 
