This is my second order and the quality and consistency is very high just as it was the first time. I like the beautiful deep red glow of the 660nm red wavelength these LEDs emit. I have had time to test eight of these LEDs at full power for several weeks now, and they are all still going strong.

This is my second order and the quality and consistency is very high just as it was the first time. I like the beautiful deep red glow of the 660nm red wavelength these LEDs emit. I have had time to test eight of these LEDs at full power for several weeks now, and they are all still going strong.

This is my second order and the quality and consistency is very high just as it was the first time. I like the beautiful deep red glow of the 660nm red wavelength these LEDs emit. I have had time to test eight of these LEDs at full power for several weeks now, and they are all still going strong.

I tested all 15 of the 660nm LEDs and they were consistent in their brightness and color. This is a great deal on very nice LEDs!

I tested all 15 of the 660nm LEDs and they were consistent in their brightness and color. This is a great deal on very nice LEDs!

I tested all 15 of the 660nm LEDs and they were consistent in their brightness and color. This is a great deal on very nice LEDs!