"Cool daylight" vs "daylight" T5

**joeyttk** · 1st Apr 2008, 09:32

I recently replaced 3 of my T5 tube, and end up buying "cool" instead of the normal philip "daylight" bulb.

the "cool" lights seems yellowish compared to the regular "daylight" bulb. will this cause algae problem for my tank ?

**jacian** · 1st Apr 2008, 09:45

Are you referring to Cool White? Cool white has a colour temperature of 4000K as compared to the perferred daylight of 6500k. I will not say it will definitely cause algae problem but it is not a good spectrum for the plants.

**joeyttk** · 1st Apr 2008, 09:49

damn.... looks like I just wasted some mula on them.... my plants are very stable for the past 6 months. I just hope it does not denegerate into a swamp because of those lightings

**dcwk** · 1st Apr 2008, 10:54

What plants do you have?

**joeyttk** · 1st Apr 2008, 11:14

mainly fire moss

**dcwk** · 1st Apr 2008, 11:23

I believe the moss should do fine. I used to grow java moss under poor lighting conditions. But I cannot say if algae will visit.

**arielarad** · 6th Apr 2008, 04:32

if it is only MOSS, then no problem.

**joeyttk** · 6th Apr 2008, 09:42

tks! how about the temperature ? will moss be ok if water temp is around 30degree celcius ?

**chiller** · 6th Apr 2008, 09:50

Bro, I worked in a lighting shop before, there are three types of general fluorescent lighting. Day, Cool and Warm lighting. Day light generally is 6500K and will give you a more correct colour reading when you look at things. Whereas Cool is more bluish and Warm is yellowish giving a nice warm feeling. Generally lighting for plants should be at least 6500K which falls into daylight group. Hope this helps.

**Aquaculture** · 6th Apr 2008, 13:34

Originally Posted by chiller

Bro, I worked in a lighting shop before, there are three types of general fluorescent lighting. Day, Cool and Warm lighting. Day light generally is 6500K and will give you a more correct colour reading when you look at things. Whereas Cool is more bluish and Warm is yellowish giving a nice warm feeling. Generally lighting for plants should be at least 6500K which falls into daylight group. Hope this helps.

Yupee! This is the perfect example of synergy in a forum. People from different walks of life with different experience sharing it.

**torque6** · 6th Apr 2008, 20:14

Plants usually use 6500k. So i would advise getting daylight tubes.

**Sailfin** · 9th Apr 2008, 23:40

I am currently using Hopar brand T5 Light which stated 10000K White light...is it ok for planted tank or should i downgrade to 6500K?

**All@Star** · 10th Apr 2008, 11:16

I am currently using a combination of 2 X 54W Hopar 10000K and 2 X 54W Osram 6500K for my 4 ft planted tanks. Happy with healthy plant growth so far....

**Fei Miao** · 10th Apr 2008, 12:03

Originally Posted by joeyttk

I recently replaced 3 of my T5 tube, and end up buying "cool" instead of the normal philip "daylight" bulb.

the "cool" lights seems yellowish compared to the regular "daylight" bulb. will this cause algae problem for my tank ?

Can you bring these back for exchange?

**totoro2k** · 10th Apr 2008, 13:38

Any advise where I can get these T5 light tubes ?

**larlee** · 10th Apr 2008, 15:13

Originally Posted by totoro2k

Any advise where I can get these T5 light tubes ?

You want normal T5 or T5HO?
Can get them from NA oppsite Thomson Medical

**larlee** · 10th Apr 2008, 15:17

Originally Posted by Sailfin

I am currently using Hopar brand T5 Light which stated 10000K White light...is it ok for planted tank or should i downgrade to 6500K?

I am currently using Magmun 3 x 24 T5HO, it is also come with 10000k white light. I feel that plants like 6500k more than 10000k. My plants grow very well with my PL 6500k compared to my current 10000k. I am going to change the tubes.

Any bros experience the same?