Review and testing of the Bellight 12W E27 LED lamp in 2024

So, my colleagues together with me evaluated the LED bulb from the manufacturer Bellight and it turned out not to be the best… I hope this post will help you make the right choice in the future.

First of all, about the price – 56 rubles. This is very cheap, almost the cheapest bulb that our system found, with the given parameters 12W E27 A60 4000K.

They promise a power of 12 watts. The network is the usual 220 volts. When first turned on, the power is 10.6 watts. When the voltage increases to 230 volts – 11.7 watts. This is already noticeably closer to the 12 watts announced by the manufacturer.

The power factor of this lamp is 0.6. Expenses for the year are 185 rubles when the lamp operates 8 hours a day and at a tariff of 5.38 rubles per kilowatt.

The color temperature is 3868K and the color rendering index is poor – less than 80, or more precisely 77.7. Well, the light from this lamp can be considered absolutely white.

The pulsation is somewhere in the border zone. There is a small risk. And indeed 5.76% at a low frequency of 100 Hz is a rather borderline option.

The network is 230 Volts, the lamp is warmed up, I remove the external lighting – 237 Lux.

250 Volts – 169 Lux, the illumination from this lamp noticeably decreased with increasing voltage in the network. The result is not at all trivial.

170 Volts – 50 Lux,

145 Volts – total darkness

The driver of this lamp is amazing. It changes the illumination both in the case when the voltage in the network has jumped up as an emergency, and in the case when it has dropped as an emergency.

The lamp cannot work with a backlit switch. I press the switch, it is clearly visible in the dark. The lamp burns brightly. I turn off the lamp – it doesn’t want to turn off.

Dimensions of the lamp: the first size of this pear is 116 millimeters, the second size is 59 millimeters, while on the packaging: 113 by 60. Somehow they didn’t hit it very well here, after all, 113 and 116 millimeters – there are differences.

Heating of the lamp during operation: the body heats up to 98 degrees and the bulb up to 57 degrees Celsius. Very hot.

The luminous flux that I got was 882 Lumens. And the manufacturer indicates 1020 Lumens.

Single-board design and the absence of adhesive-sealant is immediately noticeable. We decided to do without him here altogether. And so everything is very familiar. 14 LED housings, each housing measuring 2.8×3.5 mm. All housings are connected in series. Under the phosphor of each case two small crystals can be discerned, but this, of course, still needs to be clarified.

Here is a diode bridge, here is a current stabilization chip in the LED power supply circuit. And for some reason, there is free space on the diode board for wiring another similar microcircuit. In this case it is not involved in any way. And here on the diode board is an electrolytic capacitor of 400 Volts, 4.7 microfarads at 105 degrees Celsius. There is also a connector to which 220 Volts are supplied from the lamp base.

I install a thermocouple on the diode board, in the place of its maximum. I leave the lamp to work for half an hour. The temperature of the diode board is about 92 degrees Celsius. That is, there is no doubt that the diffuser put on the diode board will add another 10-12 percent, and under the diffuser it will definitely be more than 100 degrees. So the lamp did not confirm the temperature mode acceptable for long-term operation.

The voltage on the LED housing is 18.3 volts. And this means that inside each housing there are 6 small LED crystals.

Everything is standard with cooling here. The case is a composite, an aluminum radiator pressed into the plastic case. It is to it that the aluminum substrate of the diode board transfers excess heat.