QUOTE(jiejian @ Jul 6 2012, 09:40 AM)
i pm u the link

can read chinese rite?
Added on July 6, 2012, 9:44 amGOOD luck.. ya led saves light bill... but if u had use florescent b4 u will find d colour abit funny la.. lol.. my plants are digging my led flood light though
tatz y i went with them

later upload my tank photo again hehe...
found out my tank's prob is temperature too high.. hovers around 29-30c
haiz.. seems like need fan ler... my diy cooler seems to fail me ed.
ya you will find out the color is funny. this is because LED spectrum is very narrow, not like florescent.
For white LED , it will only output "pure white". blue and yellow spetrum is very very narrow. UP brand uses blue LED to compensate but it is not natural too.
Short saying, for time being, if you want to use LED, there are very limited choice with quite bad efficiency.
thats why i taking so many different color temperature LED. i need to test for best combination of visual effect as well as plants growth.
Price might not be cheap since i using 3W/10W/20W LED, not those cheapo LED like other brand is doing.
Added on July 6, 2012, 9:59 amQUOTE(Goldiger79 @ Jul 6 2012, 09:49 AM)
I want ask. why 3watt led got 8000k, 10w led also got 8000k? Then got what different? Why dont only take 10w 8000k?
IMHO (sorry i still lack of information)
Plants like light with color temperature 8000-12000k. Thats why you will see Aquazonic using 12000k and sunsun 10000k.
Normal white LED is only 6500k-8000k.
As for human eyes, in planted tank we like yellow and blue spectrum. maybe 30% yellow and 70% blue.
so my plan:
10W 10000k LED use for plants grow. it can penetrate until bottom tank and makes HC and other carpet plants happy.
3W LED, 6500k, 8000k, 14000k, for human eye to be happy.
Simply testing and experimenting.
This post has been edited by weijie: Jul 6 2012, 09:59 AM