LED vs T5 — Which Lighting is Better?

Complete comparison of LED vs T5 fluorescent lighting for aquariums. Cost, efficiency, spectrum, and recommendations.

technik · 7 Min. Lesezeit · lighting, LED, T5, comparison, equipment

LED vs T5 — Which Lighting is Better?

The aquarium lighting world has shifted dramatically toward LEDs, but T5 fluorescent lights still have loyal followers. Let's compare both technologies objectively.

Technology Overview

T5 Fluorescent Lighting

How it works:

Lifespan: 6-12 months before significant output degradation

Efficiency: Moderate (produces heat)

Spectrum: Fixed (depends on tube type)

LED (Light Emitting Diode)

How it works:

Lifespan: 30,000-50,000 hours (5-10+ years)

Efficiency: Very high (minimal heat)

Spectrum: Adjustable (RGB models)

Head-to-Head Comparison

1. Energy Efficiency

Winner: LED

LEDs use 40-60% less energy than T5 for the same light output.

Example:

Over 10 hours/day:

Savings: €55/year on electricity

Verdict: LEDs pay for themselves in 2-3 years via energy savings.

2. Heat Production

Winner: LED

T5 lights produce significant heat, which can raise tank temperature 1-3°C (especially in summer).

LEDs produce minimal heat, keeping tank temperature stable.

Impact:

Verdict: LEDs are superior, especially for warm climates or small tanks.

3. Light Spectrum

Winner: Tie (depends on needs)

T5 Spectrum Options:

Fixed spectrum per bulb — can't adjust without changing tubes.

LED Spectrum Options:

Verdict:

4. Intensity & PAR (Photosynthetically Active Radiation)

Winner: Depends on model

PAR = light usable by plants (measured in µmol/m²/s)

High-end T5 fixtures (e.g., ATI Sunpower):

High-end LED fixtures (e.g., Chihiros WRGB II, ONF Flat One):

Budget LEDs (e.g., Nicrew):

Verdict:

5. Lifespan & Maintenance

Winner: LED

T5 bulbs degrade:

Cost: €10-20 per bulb, 4 bulbs = €40-80/year

LEDs last 5-10+ years with minimal degradation.

Verdict: LEDs save €200-400 over 5 years in bulb replacements.

6. Aesthetic Features

Winner: LED

T5: Basic on/off (unless using expensive controllers)

LED (modern fixtures):

Verdict: LEDs offer far superior control and aesthetics.

7. Shimmer Effect (Water Surface Ripples)

Winner: LED (point-source lights)

T5 tubes: Diffuse light = minimal shimmer

LEDs (especially high-power clusters): Create beautiful rippling light patterns on substrate

Verdict: LEDs provide more "natural sunlight" aesthetic.

8. Initial Cost

Winner: T5 (but not by much anymore)

T5 Fixture (4×24W): €80-150

Bulbs: €40-80 (need replacing yearly)

Budget LED (Nicrew, Hygger): €40-80

Mid-range LED (Fluval Plant 3.0): €120-180

High-end LED (Chihiros WRGB II): €250-400

Verdict: Budget LEDs are now cheaper than T5 setups when factoring in bulb replacements.

When to Choose T5

1. Deep Tanks (60cm+ depth)

High-end T5 (ATI Sunpower) still penetrates deep water very well.

Many budget LEDs struggle to reach substrate in deep tanks.

Solution: High-end LEDs (Chihiros, ONF) match or exceed T5 penetration.

2. You Already Own a T5 Fixture

No need to replace if it's working!

Just replace bulbs yearly and it'll serve you well.

3. Budget High-Light Setup

4×24W T5 + plant bulbs = excellent PAR for €100-150 all-in.

Equivalent LED PAR may cost €200+.

When to Choose LED

1. New Setup

LEDs are now the standard — better efficiency, features, and lifespan.

2. Small-Medium Tanks (<60cm depth)

Budget LEDs (Nicrew, Hygger) provide excellent value and sufficient PAR.

3. You Want Automation & Control

Timers, dimming, RGB control = LED only.

4. Low Maintenance

No bulb replacements for 5-10 years — set it and forget it.

5. Hot Climate

Minimal heat output keeps tank cool.

Recommended Fixtures

Budget LED (~€50-80)

Mid-Range LED (~€120-200)

High-End LED (~€250-400)

T5 (If Preferred)

Conclusion

For most hobbyists in 2024-2026, LEDs are the better choice:

T5 still has niche uses:

Best recommendation:

The LED revolution is here — and it's worth it!

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