Autumn collection of stylish LED lamps, testing 8 models
Domestic company ISVET proposed to test the range of LED lamps with E27 and E14 sockets. When agreeing on the terms of testing, I immediately notify that I do not write custom reviews. I help consumers find quality products and protect them from deception, which is full in the LED market.
Parameters
The images show the claimed characteristics.
The lineup
ISVET bulbs stand out from the rest thanks to their creative packaging, illustrated in the shape of an owl. The range consists of 4 high power 10-18w lamps with E27 base, classic ball shape. Of 4 small-sized 8w LED lamps, which are installed in hard-to-reach places with limited volume.
7 models have a color temperature of 4000K, which corresponds to neutral white light. If you are switching from incandescent bulbs to LED lighting, then 4000K will be the best option. One 18W model has a color temperature of 6000K, corresponding to a cold white light.
Dimensions and filling
For a visual comparison, a standard 60w incandescent lamp is used. Before buying, measure the free space in the lamp or chandelier, so that later you do not waste time returning the lamps back to the store.
When disassembling the lamps, it was not possible to remove the diffuser, it was necessary to carefully cut it down at the base. A common opaque diffuser blocks an average of 20-25% of the light from LEDs.
Appliances used
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Devices are used to conduct tests:
- thermal imager Seek Thermal Compact PRO;
- wattmeter Robiton PM-3M;
- UPRtek MK350 spectrometer;
- light meter Radex Lupine;
- photometric sphere.
All devices are tested and tuned in certified lighting and electrical laboratories.
Power
Actual energy consumption is measured after warming up for 30 minutes before the luminous flux stabilizes. During this time, the power consumption may decrease slightly, During this time, the power consumption can be reduced by up to 5%.
The measurement results show that the declared power is equal to the specified one, taking into account the permissible error in production and the error of measuring instruments.
The photo shows the measurements of samples A67-101-1-4-1 and C37-101-1-4-2.
Lamps 10-18W
| Model | Declared | Measured |
| A60-101-1-4-1 | 10w | 9.1w |
| A60-101-2-4-1 | 15w | 14.6w |
| A67-101-1-6-1 | 18w | 16.9w |
| A67-101-1-4-1 | 18w | 17.5w |
8W lamps
| Model | Declared | Measured |
| C37-101-1-4-1 | 8w | 7.3w |
| C37-101-1-4-2 | 8w | 7.2w |
| G45-101-1-4-2 | 8w | 7.3w |
| CT37-101-1-4-1 | 8w | 7.4w |
Thanks to a high-quality driver, ISVET bulbs operate at 130V without dimming. Most of the lamps sold will stop working already at 170 volts.
Luminous flux and light pulsation coefficient
The luminous flux was measured in the photometric sphere after compulsory heating for 60 minutes. Heating the LEDs leads to a decrease in the luminous flux, on average this figure is 5%. The reduction depends on the quality of the components and the build quality.
Taking into account the error of the measuring devices, the results of measuring the light flux fit into the permissible 5%, which are permissible in production.
Lamps 10-18W
| Model | Declared | Measured |
| A60-101-1-4-1 | 950lm | 905lm |
| A60-101-2-4-1 | 1500lm | 1438lm |
| A67-101-1-6-1 | 1800lm | 1810lm |
| A67-101-1-4-1 | 1800lm | 1790lm |
8W lamps
| Model | Declared | Measured |
| C37-101-1-4-1 | 850lm | 763lm |
| C37-101-1-4-2 | 850lm | 747lm |
| G45-101-1-4-2 | 850lm | 780lm |
| CT37-101-1-4-1 | 850lm | 752lm |
All samples have a luminous flux ripple factor of less than 1%, which means that the installed power supply copes well with the load. The spectrogram shows frequencies up to 370 Hertz, the spectrogram is flat, without bursts at frequencies of 100 and 200 Hertz.
The samples worked without dimming at 130 volts instead of the required 220 volts. This is rare, most lamps from other manufacturers have a lower operating voltage of 160-170 volts and then the lamp turns off.
Heating and service life
To measure heating, we select the most powerful LED lamp E27 at 18w 4000K and an 8w 4000K lamp with an E27 base. LEDs, which are used in general-purpose lamps, can already withstand heating the crystal up to 110 – 115 degrees without derating.
The case itself is used as a cooling system, which is made of aluminum and covered with a thin plastic called polybutylene terephthalate. To apply this difficult word, you can ask in the store “Are there polybutylene terephthalate bulbs on sale.”
The LED lamps were warmed up with a diffuser installed; it was removed before measurement. The temperature on the plate with LEDs for the samples was the same 97-98 percent. The case warmed up to 79-84 degrees. The cooling system fully copes with the assigned load, which significantly increases the service life.
| LEDs | Housing | |
| Sample 18w | 97 ° | 79 ° |
| Sample 8w | 98 ° | 84 ° |
Colorful temperature
Color temperature measurements were carried out with UPRtek MK350 spectrometer. The color temperature of the samples corresponds to the declared 4000K and 6000K.
Backlit switch compatible
One of the features of ISVET LED lamps is the correct operation with switches in which neon or LED backlighting is installed. Most manufacturers do not indicate this feature in the characteristics, just keeping silent about it. As a result, the buyer faces such a problem, in the off state, the LED lamp starts flashing or glowing. These ISVET samples completely solve this problem.
Packaging
Where to buy to feel?
You can buy iSvet lamps on the marketplace Beru or at manufacturer’s official website…
Outcome
The tests carried out show that apart from attractive packaging, ISVET LED lamps also have the correct characteristics. Relatively low heating of LEDs will maximize the service life. A high-quality power source provides no light pulsations and operates in a wide range of mains voltage, from 130 to 250 volts. Compatible with illuminated switches will save you a lot of lamp problems.
