Review: Remez SunLike E14 LED bulb (3000K, CRI95)

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maukka
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Review: Remez SunLike E14 LED bulb (3000K, CRI95)

User SunLike from sunlikelamp.com sent me a Remez E14 LED bulb for testing.
Store page: http://sunlikelamp.com/index.php?route=product/category&path=59_105
Manufacturer website: https://remezlight.com/en/production/light-for-home/led-bulbs/led-s37-5w...

The main specs by the manufacturer:
-3000K color temperature (also available in 5000K)
-CRI 95
-SunLike SMD 3030 emitters
-300 lumens
-5W power rating (also available in a 7W version)
-Power factor >0.5
-AC voltage range of 170-260V (also available in 110/120V)
-Not dimmable
-30000 hour lifetime
-5 year warranty

The bulb is also available with an E27 base in 5 and 7 watts. Review here.

Measurements

Measurements were made in a 50cm integrating sphere with an x-rite i1pro spectrometer after the bulb had warmed up for 1 hour. Intensity (lux at 1 meter, candela) was measured outside the sphere at 50cm.

The bulb was connected to mains power which at the time of testing was at 220V.

Output at 1 hour is 296 lumens. Manufacturer claims 300 lumens. The output drops 21% during the first hour from 377 lumens at turn on.

The bulb is very light so there’s not much heatsinking, which explains the long winded drop in output. Thankfully the power of the bulb is not very high either so it doesn’t get exceedingly hot, but hotter than the E27 version at 79 degrees celsius.

Power consumption was measured at 4.8 watts at 220 volts with a low power factor of 0.59. Total bulb efficacy is low even for a high CRI warm light source at 61 lumens per watt.

Maximum output is reached immediately. Light output in lumens was plotted over one hour. Output is stable after the intial warmup.

Color rendering

The CRI data was measured integrated after a 1 hour warmup in an integrating sphere.

Color rendering is excellent at CRI Ra of 97 and R9 of 94. TM-30-18 fidelity index Rf of 95 and gamut index Rg of 104 are also very good. Just like on the 5700K SOL bulb, there’s three distinct but small humps in the spectrum at different wavelengths (450, 520 and 620 nm). There’s no near UV content.

Visually the light is pleasantly warm with a slight rosy tint to it. The 3000K color temperature makes it bring out colors just a bit more than a very warm candle like lamp like the Bedtime Bulb.

Load IES TM-30-18 Color Rendition Report by clicking on the thumbnail:

CGATS CRI Data file:
https://pastebin.com/Yws1Yg44

Color temperature and tint

Tint is below the black body line but visually neutral. Remember that when LEDs heat up, their duv value almost always decreases and becomes less green/yellow. This was measured after 1 hour in an integrating sphere so the tint has already stabilized.

Tint is even around the bulb thanks to the diffuser. The color temperature gets only slightly cooler when moving to the side, but the near constant duv value makes it not distracting.

Flicker

The switching frequency of 42kHz is not visible to the eye. The snob index of 0% guarantees that it’s easy on the eyes. High frequency flicker is probably not visible to a camera at high shutter speed either.

The light is also stable on a noisy AC source or a simulated/stepped sine inverter. However, there’s a bit more audible buzz with a stepped sine wave inverter than on the E27 Remez. It’s far from obnoxious at a meters distance though.

AC power draw

Current is drawn in short pulses 100 times a second as the input voltage gets high. There’s no power factor correction which results in a power factor of 0.59.

Cyan line: mains line voltage
Yellow line: current draw of the bulb
Violet line: power draw (voltage * current)

Verdict
The Remez warm white bulb utilizing SunLike LEDs has a very similar spectrum to an incandescent bulb. Other than the low total efficacy of about 60 lumens per watt and mediocre heatsinking it performs very well. It is also very cheap considering the quality of light at $6 or 5.40€ a piece. There’s no visible flicker to the eye or to a camera and the bulb turns on immediately at full power.

Please note that the test was done when the bulb was brand new. I can’t guarantee that they will perform similarly after months or years of use.

Edited by: maukka on 02/17/2020 - 14:51
SunLike
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Thanks. But not Remez. REMEZ. All letters are big. Brand NAME
Upd. Only 3000k and 5700k available.

BelMORDOR’s Ламповщик|Lampman

SunLike
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I will add here the same post:
If someone want, there is REMEZ review from me (rus language)

there is some photos:


e14 5w & 7w and E27 7w works with 110-120v with ~1% pulse (measured by RADEX LUPIN)
E27 9w with 110-120v pulsed on ~25%
all of these works with 80-100v, but throbbing about 50%
in 9W there is 3.3uf, I upgraded it to 4.7uf, and now it works with 110-120v with ~1% pulse

If someone want to buy some REMEZ bulbs with international shipping ($6 for any order) or find out the price, you can do it HERE

BelMORDOR’s Ламповщик|Lampman

Joshk
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I just got my 7 watt Remez 3000K 170-260V?! bulbs today. A quick in-fixture spectrometer reading says Duv is -0.0041. That’s more than 4 MacAdams tints beyond BBL/White. Everything at my desk looks like I got a light dusting of red spray-paint overspray on it. More info to come tomorrow…

JaredM
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Interesting how something with such a negative Duv oversaturates greens. I wonder if this is why Maukka mentioned it looked neutral to the eye

SunLike
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JaredM wrote:
Interesting how something with such a negative Duv oversaturates greens. I wonder if this is why Maukka mentioned it looked neutral to the eye

I think he used 2700k, and after this it can be neutral. Or etc.

BelMORDOR’s Ламповщик|Lampman

Joshk
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Ok, so I did some proper testing in a dark room.
The Duv of the Remez bulbs starts rosy and gets rosier as it reaches operating temperature. Immediately after they turn on, the Duv is slightly rosy at -0.0013. But as it reaches operating temperature it gets much rosier, down to Duv -0.0034. This is too rosy for my comfort.
So I made some “Rosy Delete” paint for my bulbs. I’m painting all 8 of my bulbs to get back to white Tired . My first bulb now achieves a Duv of 0.0000 at operating temperature, and the CRI Ra is up from 96.6 to 97.8.

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Here’s the before and after data! I number my bulbs, this data is all bulb #3, which is the first one I painted with Rosy Delete.

BEFORE
CCT: 2920
Duv: -0.0034
CRI Ra: 96.6
Rf: 95
Rg: 104
CSV FILE

—————————————————————————————————————————————————-

AFTER
CCT: 3053
Duv: 0.0000 Shocked Big Smile
CRI Ra: 97.8
Rf: 96
Rg: 102
CSV FILE

*Please note that the after file name says ‘cold reading number 11’, but by the 11th reading it was hot. So the comparisons are apples to apples.

Joshk
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For anyone interested, here’s an uncorrected bulb and corrected bulb #3 side by side. As you can see it took some serious green to cancel the serious rosy.