What is the kelvin rating on the bulbs?
2077714
Kelvin is usually used to rate cfl's the spectrum for Metal halide is mostly in the blue green for vegetative growth about 40,000 lumen's that equivalent would be in the higher range from 5000 to 6500 kelvin. For high pressure sodium the range is in the red area of the spectrum for flowering 50,000 lumen's the kelvin equivalent would be around 2700.I'm old school and Kelvin is a measurement of heat i.e. Fahrenheit, Celsius, Kelvin the kelvin scale is used primarily for extremely low temperatures close to absolute zero as a rule metal halide for vegetative growth and high pressure sodium for flowering but its always better if you can use both......Hope this Helps Kelvin is usually used to rate cfl's the spectrum for Metal halide is mostly in the blue green for vegetative growth about 40,000 lumen's that equivalent would be in the higher range from 5000 to 6500 kelvin. For high pressure sodium the range is in the red area of the spectrum for flowering 50,000 lumen's the kelvin equivalent would be around 2700.I'm old school and Kelvin is a measurement of heat i.e. Fahrenheit, Celsius, Kelvin the kelvin scale is used primarily for extremely low temperatures close to absolute zero as a rule metal halide for vegetative growth and high pressure sodium for... » Read More Kelvin is usually used to rate cfl's the spectrum for Metal halide is mostly in the blue green for vegetative growth about 40,000 lumen's that equivalent would be in the higher range from 5000 to 6500 kelvin. For high pressure sodium the range is in the red area of the spectrum for flowering 50,000 lumen's the kelvin equivalent would be around 2700.I'm old school and Kelvin is a measurement of heat i.e. Fahrenheit, Celsius, Kelvin the kelvin scale is used primarily for extremely low temperatures close to absolute zero as a rule metal halide for vegetative growth and high pressure sodium for flowering but its always better if you can use both......Hope this Helps « Show Less
1764232
To my knowledge, it is 4200 K with a light output of 3350 +/- 300 lumens. Higher temperatures do not mean brighter bulbs. Higher temperature bulbs put out less light.
285216
It says 2700 K on the box the bulb came in. That's towards warm white, but it actually looks much whiter, as the bulb is clear & not diffused.
350954
You are asking for the Color Rendering Index (CRI) of the florescent tubes that ship with this product. Another way to put it is the color temperature, or light spectrum.I believe these are rated as natural sunlight or day light bulb around 500-600 Kelvins but do not quote me as I don't have the manufacture product specs. I would suggest you check with the manufacturer for that specific rating.As a gardener I find they work great for seed trays and plant starts. However, I'm not trying to grow anything exotic or medicinal.
1723505
On the lighting facts label look for the K number (Kelvins, which means color temperature). These are 2700K...a warm-white which is the "yellow" look you mention. The higher the number, the whiter and less "yellow"the light gets. 5000K, for example, is very, very white, almost blue-white.
545488
i'm sorry, these numbers I don't recognize for fit with these bulbs. Good luck.
2141154
Those are 2 very different measurements. Lumens are the light output while kelvin is basically the color. Expect about 600 lumens and about 8000k. It depends on how you drive the light and what type of power source you are using for the output.
606067
Are you asking for the Kelvin color or for the Lumens? Neither is listed on the package, but the light is warm white is probably around 4000K (not too warm). The lumens are low and equivalent to a 40W bulb.
509271
Close to stark white, 6400k appears to be accurate. After one year of use these bulbs are still working great.
1277264
No idea. Mine are only a few months old and need to be replaced. Even with the rubber boot around the bulb, the housing collects moisture and rust inside
706582
I'm not absolutely sure, but I don't this bulb it is rated for damp conditions
2023619
they spec it in degrees kelvin. compared to other leds I've bought, they are more yellow, natural sunlight. The dispersal seems fairly even over the 120 degree pattern.
2135109
Not sure on the kelvin rating, but yes they are a bluish white in color. Illumination in general is quite good.
1684259
The bulb is a broad spectrum 15 Watt T5, that gives a "violet" colored light. There is no K scale rating on the light or packaging.
1788776
I found on the internet that the +C may mean the bulb is coated to reduce heat to the fixture.. if that's the case then consider that these bulbs are only 3W, and produce very little heat.. make your own decision from there....
1385801
Was curious about this myself, so I measured the temperature with my infrared thermometer. The base of the bulb got surprisingly warm given the 4.5 watts, and measured around 150 degrees F or so. For reference, the 40w incandescent bulbs they replaced got to about 260 degrees F. So noticeably cooler, but still warmer than I expected.
1213239
Please note these are 12V bulbs, not 120V bulbs. That said, I have no way of measuring the color temperature of the bulbs but from my experience with others I'd say these are about 6000k.