Does sword tail fish need light?

[leesa23]

Four days ago I bought 4 sword tail fish today and I am not sure if they need to have light. I have a light attached to my tank if they need it. Please help me.

[parker002]

All fish need light. All living things need light. Why would you leave it off 24 hours a day?

[Carl]

I would definitely run this light, at least 8 hours

See this article, in particular the lighting section:
A Healthy Aquarium; Disease Prevention

Also see Freshwater Aquarium Basics

BTW, welcome to Everything Aquarium

Carl

[Suzie Q (Lori)]

I agree with Parker and Carl...all living things need light.

[birdman]

Yes, they need a light or a heater but I prefer a light, because it lights your tank and heats the water, but they do need a light but be sure only to give them a few hours of light because, they have to sleep too.

[parker002]

With newer technology and larger tanks, your lights won't provide NEARLY enough heat and tropical fish will need both.

[nickhun]

Yes they really need light, get some light that are not too bright for them....

[goldenpuon]

I agree. Lights are *not* made to heat a tank and don't heat the tank much what so ever if at all. Light is beneficial to plants and fish.

[bunnygirl]

Actually they don’t need the light, but if you have live plants or a saltwater tank then you need to put a light at least 12 hours per day.