OWL in Silicone - Tiny LED Bulbs
Let me remind you, COB is short for chip on the board. This is a kind of SDL, in which firstly a matrix of LED crystals is arranged on the substrate, which is then covered with a single layer of phosphor. By the way, the so-called. filaments also fall into this category.
I received these lamps for quite a long time - but put it aside. There was some stress from the fact that the seller promised 9 watts of power. And sent only 2W. Those. clearly deceived. Although it was clear to me that 9 watts in such a construction are hardly achievable, more plastic will flow.
Bulbs are just tiny:
')
They are sold with different bases, I chose E14. As you can see, it's really a little less, the lamp in the base slightly backlash:
Macrophoto burning lamp (BB adjusted):
The quality of the lamp manufacturing leaves much to be desired. The metal base is not fixed, so when I turned out the lamp, it remained inside. Zero wiring is simply pushed between the base and the plastic shank under the base.
At the same time, it’s cool that silicone rubber, in which the OWB is sealed, is elastic. And the burning lamp can be tilted to the left and right for a few millimeters.
I remembered about them after the publication of Alexei Nadyozhin , in which for similar-shaped lamps he received a surprisingly low value of the CQS index (about 36).
So I decided to take a look at what my lamps show.
Warm: T = 3000K (while there is a green shade of 13 units). Power 2W, 0.01A, Km = 0.9 Color rendering index 81.
Cold: T = 6200K (magenta 31 units). Power 1.9. Km = 0.9. Color Rendering Index 68.
I was pleasantly surprised by the high value of the color rendering index for a warm glow lamp. The index for the cold lamp, as usual, is lower. But it does not go beyond reasonable values. 70 is a more or less standard value for ordinary cold light SDLs. To evaluate the index, I use the CQS target (6 dice).
The only strange point is the presence of a magenta shade in the light of a cold lamp. As a rule, in bad lamps there is a green caste. In good shade around zero. And here:
On the left you can see part of the target ColorChecker, on which the BB was exposed. The engine of the Tint scale is shifted to green - but this means that in real light there is a shade of magenta, since These are indications after white balance correction. Those. -31 in green is compensation +31 in magenta.
In my opinion, some simple blunder has crept into Alexey’s measurements.
I received these lamps for quite a long time - but put it aside. There was some stress from the fact that the seller promised 9 watts of power. And sent only 2W. Those. clearly deceived. Although it was clear to me that 9 watts in such a construction are hardly achievable, more plastic will flow.
Bulbs are just tiny:
')
They are sold with different bases, I chose E14. As you can see, it's really a little less, the lamp in the base slightly backlash:
Macrophoto burning lamp (BB adjusted):
The quality of the lamp manufacturing leaves much to be desired. The metal base is not fixed, so when I turned out the lamp, it remained inside. Zero wiring is simply pushed between the base and the plastic shank under the base.
At the same time, it’s cool that silicone rubber, in which the OWB is sealed, is elastic. And the burning lamp can be tilted to the left and right for a few millimeters.
I remembered about them after the publication of Alexei Nadyozhin , in which for similar-shaped lamps he received a surprisingly low value of the CQS index (about 36).
So I decided to take a look at what my lamps show.
Warm: T = 3000K (while there is a green shade of 13 units). Power 2W, 0.01A, Km = 0.9 Color rendering index 81.
Cold: T = 6200K (magenta 31 units). Power 1.9. Km = 0.9. Color Rendering Index 68.
I was pleasantly surprised by the high value of the color rendering index for a warm glow lamp. The index for the cold lamp, as usual, is lower. But it does not go beyond reasonable values. 70 is a more or less standard value for ordinary cold light SDLs. To evaluate the index, I use the CQS target (6 dice).
The only strange point is the presence of a magenta shade in the light of a cold lamp. As a rule, in bad lamps there is a green caste. In good shade around zero. And here:
On the left you can see part of the target ColorChecker, on which the BB was exposed. The engine of the Tint scale is shifted to green - but this means that in real light there is a shade of magenta, since These are indications after white balance correction. Those. -31 in green is compensation +31 in magenta.
In my opinion, some simple blunder has crept into Alexey’s measurements.
Source: https://habr.com/ru/post/401037/
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