How many hours should planted tank lights run?

Most beginner systems perform best around 6-8 hours with consistent timing.

Do beginners need high-output lights?

Not usually. A controllable mid-range fixture is safer and easier to tune.

Quick answer: Choose an adjustable LED matched to plant demand and start at lower intensity to avoid algae spikes.

Lighting picks for planted tanks based on plant demand, dimming control, and tank depth.

Best Aquarium Lights for Planted Tanks (AU) comparison table
Class	Best For	Control	Power Use	Quick Link
Entry LED	Low-tech plants	Basic timer	Low	Check Entry LED options
Adjustable LED	Mixed planted tanks	Dimming + schedule	Medium	Check Adjustable LED options
High-output LED	Demanding plants	Advanced controls	Higher	Check High-output LED options

Steady intensity and photoperiod are more important than maximum output for long-term plant health.

Start around 6-8 hours daily and increase only when plant growth is healthy and algae remains controlled.

How many hours should planted tank lights run?: Most beginner systems perform best around 6-8 hours with consistent timing.
Do beginners need high-output lights?: Not usually. A controllable mid-range fixture is safer and easier to tune.