Review and test Wi-Fi light bulbs SLS

I continue to study controlled lamps and other smart home components from different manufacturers. Under the SLS (Smart Life System) brand, 78 different smart devices are produced, including sensors, sockets, relays, switches, intercoms, cameras, fitness bracelets, kettles and robotic vacuum cleaners.

There are now twelve Wi-Fi bulbs in the SLS assortment, I studied them and tested them.

All lamps are connected to a 2.4 GHz Wi-Fi router and controlled from the application.

At SmartLifeSystem There are two types of lamps:

traditional matte, which can change the brightness, color temperature, and also shine in different colors (five types of LEDs are installed in them: “warm”, “cold”, red, green, blue).

transparent filaments that can change brightness and color temperature (they have two “warm” and two “cold” LED filaments). Two models have transparent glass, two are tinted.

The lamps work on the Tuya platform, so they can be added both to the SLS devices for life proprietary application, and to Smart Life, Tuya applications, as well as other applications of Russian manufacturers of smart home systems.

Technical parameters are indicated on the lamp boxes.

One side of the box shows other SLS smart home devices.

In my laboratory, I measured the light parameters of SLS lamps in various modes. All lamps were tested in the maximum brightness modes of the warmest, neutral and coldest light (I note that the color temperature is smoothly regulated, I measured only the extreme and central values). I also tested lamps with color modes in red, green and blue light modes at maximum brightness. Additionally, the parameters of the lamps were measured in the mode of minimum brightness of warm white light to determine how suitable the lamps are for use as a night light and to measure the maximum level of white light pulsation (if there is a pulsation, it will be maximum at the minimum brightness).

Color temperature, color rendering index and ripple were measured with an Uprtek MK350D instrument. The luminous flux was measured using a half-meter integrating sphere and the same Uprtek MK350D spectrometer. Power consumption was measured with a Robiton PM2 instrument. Operation at reduced voltage was controlled using a Suntek TDGC2-0.5 LATR and a Lamptest-1 instrument.

The results of the tests “pears”, ball and spot:

The SLSLED_1 pear lamp in white light modes consumes 9.5 W and gives ~ 850-1000 lm, depending on the color temperature. This lamp is able to replace an incandescent lamp with a power of 80 watts. At minimum brightness, the lamp gives about 100 lm (10% of maximum brightness). In color modes, the lamp consumes about 1 W and gives 9-29 lm depending on the color.

The SLSLED_2 pear lamp in white light modes consumes about 10.5 W and gives ~ 1000-1100 lm, depending on the color temperature. This lamp is able to replace an incandescent lamp with a power of 90 watts. At minimum brightness, the lamp gives about 120 lm (12% of maximum brightness). In color modes, the lamp consumes about 2 watts and gives 42-196 lumens depending on the color.

A large SLSLED_5 ball in white light modes consumes about 10.5 W and gives ~ 1150-1250 lm depending on the color temperature. This lamp is able to replace an incandescent lamp with a power of 95 watts. At minimum brightness, the lamp gives about 125 lm (10% of maximum brightness). In color modes, the lamp consumes about 1 W and gives 8-28 lm depending on the color.

Spot GU10 SLSLED_5 has a matte diffuser and a wide angle of illumination. In white light modes it consumes about 5.5W and produces ~420-470lm depending on color temperature. It is able to replace the usual spot 50 watts. At minimum brightness, the spot gives about 48 lm (10% of maximum brightness). In color modes, the spot consumes about 1 W and gives 8-15 lumens depending on the color.

“Candles” and “balls”:

Candle lamps SLSLED_3 and SLSLED_6 with sockets E14 and E27 are similar in parameters. In white light modes they consume about 5W and produce ~500-550lm depending on the color temperature. They can replace an incandescent lamp with a power of 55 watts. At minimum brightness, the luminous flux is about 60 lm (12% of maximum brightness). In color modes, the consumption is about 1 W, the luminous flux is 7-18 lm, depending on the color.

Ball lamps SLSLED_7 and SLSLED_4 with E14 and E27 sockets are also similar in parameters. In white light modes they consume about 4.5W and produce ~400-470lm depending on the color temperature. They can replace an incandescent lamp with a power of 45 watts. At minimum brightness, the luminous flux is about 50 lm (12% of maximum brightness). In color modes, the consumption is about 0.5 W, the luminous flux is 5-13 lm, depending on the color.

Filament lamps:

All four filament lamps have the same electronics and LEDs. The only difference is in the shape of the bulb and the presence or absence of tinting (tinted lamps have a slightly lower color temperature in all modes). All lamps consume 4 W, give 400-470 lm, replace a 40-45 W incandescent lamp.

All lamps have almost no light pulsation in all white light modes. A small pulsation in color modes was found only in the first pear lamp and in the large ball, but the value of the pulsation coefficient does not exceed 12% and such pulsation is not visually noticeable.

All non-filament lamps, except for the two most powerful ones, work correctly at a mains voltage above 200 volts, 11 W lamps (SLSLED_2 and SLSLED_5) work at a voltage of 210 V and above, filament lamps at 220 V and above. The voltage value at which the luminous flux drops by 5% of the value indicated in the column of the table “Umin”. At lower voltages, the lamps may not work correctly (the light may flicker).

Color rendering indexes CRI (Ra) for all lamps are 83-94, depending on the color temperature.

Spectra in the warmest, neutral and white light modes using the SLSLED_1 pear lamp as an example.

Spectra of the same light bulb in red, green and blue modes.

Spectra of untinted and tinted filament lamps on the example of SLSLED_10 and SLSLED_12.

The SLS devices for life app looks like this:

Setting color modes. There is a color music mode, in which the application, “listening” to music through the smartphone’s microphone, controls the color and brightness of the lamp.

Lamps have a 1 year warranty. As of the beginning of August 2023, they cost from 550 to 700 rubles.

I will highlight four pluses of SLS Wi-Fi lamps:

a wide range (the presence of a large ball, spot, filament lamps, candles and balls with both types of base);

low prices;

using the most popular Tuya smart lighting platform, thanks to which the lamps can be controlled together with devices from different manufacturers from a single application;