How to Choose the Right Aquarium Lighting

Aquarium lighting does more than illuminate your tank for viewing — it directly powers plant growth and coral health, so choosing the right type matters more than most beginners expect.

Fish-Only Tanks

For a fish-only setup with no live plants, lighting is mostly about aesthetics and a consistent day/night cycle. Basic LED fixtures on a timer work well.

Planted Tanks

Live plants need sufficient intensity and the right spectrum (typically full-spectrum white light in the 6500K range) to photosynthesize effectively. Low-light plants like Java fern and Anubias tolerate modest lighting, while carpeting plants need much stronger output. See our aquascaping guide for plant recommendations.

Reef Tanks

Coral needs some of the strongest, most precisely controlled lighting in the hobby, since different coral types (soft, LPS, SPS) have different intensity requirements. Our Complete Guide to Coral Reef Tanks covers acclimating coral to new light safely.

Photoperiod

Most tanks do well with 8-10 hours of light per day. Excess lighting duration, more than intensity itself, is a common cause of nuisance algae in planted and reef tanks alike.

Choosing a Fixture

Look for adjustable-intensity LED fixtures if you plan to keep plants or coral, since the ability to dial in output as your tank matures is far more useful than a single fixed brightness. Browse lighting options in our aquarium accessories category.