FAQs About Aquarium Lighting

Light is an important factor in tropical fish keeping. It is important to choose aquarium lighting carefully and in accordance with the aquarium’s needs. Light is complex, and to illuminate an aquarium, it should offer more than just aesthetics. These FAQs about aquarium lighting help maintain the perfect aquarium.

Q: Does the position of the light matter?

A: In the wild, light comes from above. It is important to respect this principle when placing lights in aquariums. Strong, natural lighting on the front or side of the tank (from a window) causes algae growth, so artificial lighting is mandatory. Also, a reflector above the light sources to make the most of the light emitted is also a good idea.

Q: How long should the aquarium light stay on each day?

A: Tropical plants need lighting for a duration of 12 hours each day. The maximum lighting duration is 15 hours, but beyond that, the plants (and fish) need a rest period. The lighting process is continuous; an interruption might disrupt the rhythm of the fish and plants. Furthermore, low light intensity is not offset by a longer lighting duration; however, using a timer to turn the lights on and off during preset times is recommended.

Q: What are the possible aquarium lighting types?

A: There are four types of aquarium lights: incandescent, fluorescent, metal halide and compact lights (which are very similar to fluorescent lights but more powerful). One of these solutions is chosen depending on one's aquarium knowledge and budget.