WHITE WHITE LIGHT

[Jer-]

Hi

If i was to get a light with an output color of WHITE WHITE WHITE, do i jus look at the Kelvin rating?........

my question, in other words is, Is the Kelvin rating (color temp) of a light the ONLY factor that determines how white a light looks?

i am buying online two energy saver bulbs that have a color temp of 6500K. but it doesnt say wot the lumen thing is for these bulbs. I hope they are WHITE light. not the warm white sort.

 

[Lateral Line]

The Kelvin rating is more of an average of the light emitted by the phosphors in the lamp. How accurate a lamp renders colour is more correctly stated by it's CRI value, (Colour Rendition Index where CRI = 100 is perfect CRI = low, is bad).

Lumens is a weird unit because it takes into account the fact that our eyes don't see all colours with the same intensity. A lamp can have a quite low lumens value but be better for plants then a different lamp of the same wattage with a higher lumens rating.

A lamp with a rating of 6500K should not appear warm, that is, however, a generalisation.

 

[Jer-]

oh no.
That jus confused me more...haha... well, not really confuse but made me think twice about buying those bulbs.

i want WHITE WHITE light. and all i know about the bulb is that its 6500Ks.
I shud email the company about its CRI to find out whether its white or warm white rite??

 

[kenneth_kpe]

what kind of bulb is it ? brand ? usually searching aroudn the net, you would be able to find its CRI value 6500K is white for me

 

[Jer-]

it doesnt say the brand....i dont think it would be a reputable brand....Im only searching for it online cos i cant find it anywhere here in Poznan. I cant even order them, even if i could its waay too expensive.

heres a link to the bulb....does anyone know this company? used it? i wouldnt think so tho.

bulb

 

[Lateral Line]

>>> dont think it would be a reputable brand

I think you're right. A decent mail order firm with quality products generally states the manufacturer. These look like "no name" cheap lamps. Personally, I'd avoid them, but obviously, I don't know your situation.

Fact of life is that cheap gear is usually poor quality. Cheap fluorescent lamps generally don't last very long, and have very poor spectral characteristics.

 

[Jer-]

oh no
that jus totally put me off those bulbs.

Lateral Line. Is there a site u would recommend where i could find bulbs of well known brands? Denmark is in Europe so maybe u can help me find one thats based in europe... I REALLY need 6500K bulbs...my plants are thriving at the moment but Im sure they could do ALOT better with 6500Ks.

please, ppl, help me find one?

ps, what do u mean by "very poor spectral characteristics"??