XPGEWT-H1-0000-00000BLE1
2024-07-05
- Type: flip chip, domeless
- Bin: C1 (300 lm @ 700 mA 85 °C)
- Color group: E1 (6500 K)
- CRI: min 70
- Rated voltage: typ 2.8 - max 3.3 V
- Max. Forward current: 3,000 mA
- Max. Peak current: — mA
- Viewing angle: 125 ° °
- Thermal resistance: 1.3 K/W
- Max. Temperature Tj: max. 150 °C
Datasheet can be downloaded here: Cree XP-G4 HI, 3.2 MB
The emitter tested here was provided to me by BLF user @wolfgirl42. Many thanks for that! This emitter was purchased from Mouser in the USA.
The XP-G4 HI is the domeless version of the previously tested XP-G4, which was tested in 90 CRI variant. The substrate is completely covered by yellow phosphor. This is already known from earlier Cree LEDs (XP-G3, XP-L2) and has caused problematic beams.
The LED chip is built in flip chip technology, which is state of the art. The luminous surface also emits light from the side, which could cause significant tint shift in the beam due to the clearly visible yellowish coloration. The illuminated area is 2.0 mm², although it is almost impossible to determine the exact size due to the lateral radiation and the total illuminated area is way larger.
The 3535 (XP) footprint is exactly the same as for the XP-G4 with dome.
- at 3,000 mA (official maximum current): 1177 lm @ 3.33 V
- Power at official maximum: 10.0 W
- Efficiency at 3,000 mA: 117.7 lm/W
- Maximum reached at 10.0 A, at this point 2200 lm @ 4.04 V
- Power at maximum 40.4 W
- Efficiency at maximum 54.5 lm/W
Data for 25 °C Tsp (at 85 °C the luminance values are around 13 % lower).
The efficiency is relatively high, but so is the Vf. The specified binning is not only met, but even exceeded. The maximum operating current of the XP-G4 HI is primarily limited by the size of the thermal pad; the thermal resistance of the LED chip itself is extremely low. The XP-P has no chance, both Vf and thermal resistance are far too high.
The dimmed Nichia 519A is still the measure of all things in terms of Vf.
The yellow shimmering areas around the illuminated surface creates a not good looking beam in reflectors and TIR lenses. When using reflectors, yellow rings appear around a bluish-white spot, which is also in general often referred to as “Cree Rainbow” and has been occurring for years with the older XP-G3 and XHP70.2.
It may be possible to reduce this effect by adapting the optics accordingly, similar to the XHP70.2.
The spectrum corresponds to that of a cool white LED with a low color rendering index. There are no surprises. The Cree specification of “min. 70 CRI” is adhered to. The tint is slightly greenish, although, as is typical for Cree, the tint changes little or not at all with increasing operating current.
- Ra: 70
- R9: -31
- CCT: 6343 K
- duv: 0.0047
To summarize: The XP-G4 HI is an XP-G4 without dome, with all its problems. The beam is as expected, and the LED is less suitable for applications with optics if a good beam is essential. The luminance is significantly lower than that of LEDs of a similar size (CSLPM1.TG, XP-P) due to the lateral shimmering light surfaces. This LED is therefore hardly suitable for flashlights.
Thank you for reading this test. 
(indoor premium, portable, architectural)