In the Lamptest project, I test for free any LED lamps that can be bought in stores. One of the site visitors sent me a phytolamp for dough, which he bought on Aliexpress. The claimed lamp power is as much as 80 watts, promising a full spectrum, including blue, red, white, ultraviolet and infrared light and a luminous flux of 2500 lm.
The lamp is huge - 125 mm in diameter, weighs almost half a kilo.
The lamp has 120 LEDs: 78 red, 24 blue, 6 white, 6 infrared and 6 ultraviolet.
Let's start with the simplest - measuring power consumption.
A voltage of 230V ± 0.3% was applied to the lamp from the Stable Instax 500
double conversion stabilizer
. After a half-hour lamp warm-up, the accurate Robiton PM2
showed a value of 23.43 W, which is almost four times less than what the seller had promised.
The luminous flux value was measured using a Viso LightSpion instrument
. The device showed only 603 lm, which is more than four times less than the promised. I admit that the device designed to test lighting lamps on fitolamps may be wrong, but certainly not four times.
LightSpion measures electrical parameters a little less accurately, so the values of voltage and power in the screenshot are slightly different from the real ones.
The seller lists the following parameters of the lamp spectrum:
Red: 630nm ~ 660nm
Blue: 430nm ~ 460nm
The spectrum was measured using a UPRtek MK350D
The maximum spectrum of the lamp is fixed at a wavelength of 629 nm (red). This is lower than stated (630nm ~ 660nm).
The second peak is blue 456nm (83% of the maximum level).
There are only six white LEDs in the lamp and they give less than 5% of the total luminous flux, so their effects on the spectrum are almost negligible.
The UV peak does not occur at 380 nm, but at 399 nm — this is already visible purple light. The near ultraviolet is 300-400nm
. The peak level is 14% of the maximum.
Infrared peak at 737nm, its level - 9% of the maximum. In fact, this light can not even be considered infrared, because the near-infrared range starts at 740nm
I’m not a nerd and I can’t say whether a small amount of white light, UV light and infrared light at the edge of the visible range affects plant growth, or is it just a marketing ploy.
But I can definitely say that the seller’s power of the lamp is four times deceiving customers, which gives every reason to demand a return of 3/4 of the $ 20.84 spent through a dispute.
PS The lamp was bought here
© 2017, Alexey Nadyozhin