How long should you leave LED light on fish tank?

The amount of time you should leave LED lights on your Fish Tank depends on several factors, such as the type of fish you have, the type of plants you have (if any), and the intensity of the LED lights.

As a general rule of thumb, it's recommended to keep LED lights on for around 8-10 hours a day. However, you may need to adjust the duration depending on your specific circumstances. For example, if you have fish that prefer a lot of light, or plants that require longer periods of light to grow, you may need to keep the lights on for longer. Conversely, if you have fish that prefer dimmer lighting, or if you notice algae growth increasing, you may need to reduce the duration of the lighting.

It's also important to note that having consistent lighting schedules can help regulate your fish's circadian rhythms and reduce stress. Therefore, it's a good idea to establish a regular lighting schedule for your fish tank and stick to it as much as possible.