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18000K Tubes


phoenix44

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i had a yarn to chris at lamp specialists today he explained a great deal to me he is on this forum (cant remember his username ) he explained that a machine tests k rating and this technology has been around sine the early 1900s , however human eyes cant see the full spectrum so a tube that is high in blue light (not all of the blue is visible) may have a high 18000k rating but appear pink to us humans because we can cant see the blue light its putting out but may see some of the red which is (in the eyes of the testing machine) a really small part of the light output. perhaps if he sees this he will explain it better than me

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that's understandable.

there are plenty light spectra that the human eye cannot see. so the tube may be emitting the light but we cannot see it. :( Limitations of being human i suppose.

blue light which makes your plants grow compact. So long as you are getting red light from somewhere it might work well (

that's pretty much the gist of things really, so as long as the tube emits both red and blue plants should be sweet :bounce:

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Just thought I should report back... the tubes are working wonders!

the tiger lotus's leaves are much broader and larger and have more red in them. It sprouts a new leaf everyday, and man does it grow fast! I can see how much its grown in a matter of a day!

the sag. subulata is in heaven and there are no less than 5-6 shoots for the flowers :bounce:

and even my precious anubias hastifolia - which i thought would hate bright light has managed to sprout a new leaf! :bounce:

pics will follow if needed!

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I see my Crypts arrived safely :D did you separate the plantlets? I've fully re-decorated my tank (minus a few more things) so now your dwarf val is getting way more light :D

Told you those lights were magnificent! I've got four tiger lotuses now from the original two I bought from Evil_Elmo

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yep! crypts are doing well. i left them as is. if they let out more pups they can grow wild if they need to.

the tiger lotus is awesome. 2 babies, and 2stalks are now almost 2ft long!!!

the lights are sheer magic, ha ha. all the plants have gone mental. 10 flower stalks at last count for the sag subulata.

PS- i got told that dwarf val does not exist?? lol.. its sag. dwarf sag.. sag subulata... Me thinks.

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if you bought yours from a shop, they are the emersed form. mine converted over to being submersed completely. so they are real dark green and tall.

but when i first got mine, i was puzzled as to why some of the plants grew tall and some stayed short, and were a lighter green. all the plants were from the same batch etc... some jjust take longer to grow than others.

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