Battle of LED titans
LED lighting is now used everywhere - from home bulbs to street lamps. Many manufacturers began to produce powerful LED lamps of large size, which can be used for lighting warehouses, industrial and public spaces. As a rule, all these lamps have a standard E27 base and are equipped with an adapter for an E40 base. I tested six lamps with a declared power of 50 to 100 watts of the Ecola brands, Nanosvet, X-Flash.
The size of the lamps is quite large. For comparison, I photographed a lamp next to a conventional LED light bulb.
The luminous flux was measured using a two-meter integrating sphere and a Instrument Systems spectrometer , the lighting angle and consumption characteristics of a Viso Light Spion instrument, power consumption of a Robiton PM-2 instrument, color rendering index, color temperature and pulsation with a Uprtek MK350D instrument . The minimum operating voltage, at which the luminous flux decreased by no more than 10% of the nominal, was measured using a Lamptest-1 device, Stable Stab Instab 500 , LATP Suntek TDGC2-0.5 and an Aneng AN8001 multimeter . Before measurements to stabilize the parameters of the lamp heated for half an hour.
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The cheapest of the tested Ecola Premium HPUD80ELC lamps for 1,480 rubles turned out to be quite good - its luminous flux of 6444 lm corresponds to the declared one, although the real power of about 55 W is much less than the stated 80 W. There is no ripple, the color rendition index is 82.6 (this is surprising, considering that most conventional Ecola household lamps usually have color indices that are slightly above 70), the lamp can work by reducing the mains voltage to 144 volts. Such a lamp can successfully replace a DRL-125 mercury lamp with a luminous flux of 5900 lm.
The lamps Nanosvet L350 and L351 power correspond to the declared, but the luminous flux is 11% lower than the declared. Color rendering indices are also high (CRI around 84). The pulsation of light is about 20% (this is the “charge” for a high power factor — 0.95, which can be important when using lamps in industry). Such a pulsation is not visible to the human eye. Lamps can operate when the mains voltage is lowered to 134 volts.
The X-Flash 47833 XF-E40-B120-50W-4000K-230V lamp exactly fits the DRL-125 mercury lamp in shape and size, but only gives 3,725 lm with a declared luminous flux of 4200 lm. 3725 lm is about 60% of the luminous flux of the DRL-125, so it will not work as a direct replacement. But the light of the lamp is good (the color rendition index is high CRI = 84.5, there is no ripple), and the minimum voltage is 107 volts.
The X-Flash 47840 XF-E40-C105-50W-4000K-230V lamp has the same power (about 45 W) and gives a little more light - 3850 lm, but this is only 84% of the claimed. The light quality is as high (CRI = 84.1, no ripple), the minimum voltage is only 106 volts.
The most powerful X-Flash 47802 XF-E40-T142-100W-4000K-230V lamp tested has a real power of 95 W and a luminous flux of 7960 lm, which is even 3% higher than the declared one. Unlike the rest of the tested lamps, active cooling is used in this lamp and the built-in fan is quite noisy. Light quality is high (CRI = 84, no ripple), the minimum voltage is 168 volts.
A big plus of X-Flash lamps is a five-year warranty (NanoSvet has a two-year warranty, Ecola has a whole year). Lamps are not cheap, so a “long” warranty can be crucial when choosing.
100 watts is not the power limit of LED lamps. The Ecola has lamps with a declared power of up to 150 W , the X-flash has 150 W lamps and even 200 W with a declared luminous flux of 14,800 lm.
© 2018, Alexey Nadyozhin
The size of the lamps is quite large. For comparison, I photographed a lamp next to a conventional LED light bulb.
The luminous flux was measured using a two-meter integrating sphere and a Instrument Systems spectrometer , the lighting angle and consumption characteristics of a Viso Light Spion instrument, power consumption of a Robiton PM-2 instrument, color rendering index, color temperature and pulsation with a Uprtek MK350D instrument . The minimum operating voltage, at which the luminous flux decreased by no more than 10% of the nominal, was measured using a Lamptest-1 device, Stable Stab Instab 500 , LATP Suntek TDGC2-0.5 and an Aneng AN8001 multimeter . Before measurements to stabilize the parameters of the lamp heated for half an hour.
')
The cheapest of the tested Ecola Premium HPUD80ELC lamps for 1,480 rubles turned out to be quite good - its luminous flux of 6444 lm corresponds to the declared one, although the real power of about 55 W is much less than the stated 80 W. There is no ripple, the color rendition index is 82.6 (this is surprising, considering that most conventional Ecola household lamps usually have color indices that are slightly above 70), the lamp can work by reducing the mains voltage to 144 volts. Such a lamp can successfully replace a DRL-125 mercury lamp with a luminous flux of 5900 lm.
The lamps Nanosvet L350 and L351 power correspond to the declared, but the luminous flux is 11% lower than the declared. Color rendering indices are also high (CRI around 84). The pulsation of light is about 20% (this is the “charge” for a high power factor — 0.95, which can be important when using lamps in industry). Such a pulsation is not visible to the human eye. Lamps can operate when the mains voltage is lowered to 134 volts.
The X-Flash 47833 XF-E40-B120-50W-4000K-230V lamp exactly fits the DRL-125 mercury lamp in shape and size, but only gives 3,725 lm with a declared luminous flux of 4200 lm. 3725 lm is about 60% of the luminous flux of the DRL-125, so it will not work as a direct replacement. But the light of the lamp is good (the color rendition index is high CRI = 84.5, there is no ripple), and the minimum voltage is 107 volts.
The X-Flash 47840 XF-E40-C105-50W-4000K-230V lamp has the same power (about 45 W) and gives a little more light - 3850 lm, but this is only 84% of the claimed. The light quality is as high (CRI = 84.1, no ripple), the minimum voltage is only 106 volts.
The most powerful X-Flash 47802 XF-E40-T142-100W-4000K-230V lamp tested has a real power of 95 W and a luminous flux of 7960 lm, which is even 3% higher than the declared one. Unlike the rest of the tested lamps, active cooling is used in this lamp and the built-in fan is quite noisy. Light quality is high (CRI = 84, no ripple), the minimum voltage is 168 volts.
A big plus of X-Flash lamps is a five-year warranty (NanoSvet has a two-year warranty, Ecola has a whole year). Lamps are not cheap, so a “long” warranty can be crucial when choosing.
100 watts is not the power limit of LED lamps. The Ecola has lamps with a declared power of up to 150 W , the X-flash has 150 W lamps and even 200 W with a declared luminous flux of 14,800 lm.
© 2018, Alexey Nadyozhin
Source: https://habr.com/ru/post/374377/
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