Lampu Aquascape: Planted Tank Lighting Guide (PAR, Spectrum & Timing)

The right lampu aquascape depends on your plants, not on how bright the box says it is. Low-light plants (anubias, java fern, Bucephalandra, cryptocoryne, mosses) are happy with a basic full-spectrum LED. Carpets and red stem plants need strong light plus CO2. Measure light as PAR at the substrate: roughly 15–30 µmol/m²/s is low, 30–50 is medium and 50+ is high. Run it 6–8 hours a day on a timer, with a slow ramp-up if your light has one. Too much light without CO2 and fertiliser is the fastest route to algae.

What Plants Actually Need From a Light

PAR: the number that matters

PAR (photosynthetically active radiation) measures how much usable light reaches the plants. It's given in µmol/m²/s. Watts and lumens are poor guides, because two lights with the same wattage can give very different PAR.

Light level	PAR at substrate	Plants that suit it	CO2 needed?
Low	~15–30	Anubias, java fern, Bucephalandra, crypts, mosses, floating plants	No
Medium	~30–50	Most stem plants, swords, Vallisneria, some carpets with care	Helpful (liquid carbon or low CO2)
High	50+	Carpets (e.g. Monte Carlo, HC), red stems, demanding species	Yes, pressurised CO2

PAR drops quickly with depth. A light giving high PAR at 30 cm may be only medium at 50 cm. Manufacturers sometimes publish PAR charts by depth. Use them if available. A PAR meter is useful but optional for beginners.

Spectrum

Plants mainly use red and blue light, with some green. Good planted-tank lights are full spectrum or RGB, often with extra red for plant colour.

• Daylight white (6,500K): good all-round growth
• RGB / WRGB: makes reds and greens pop, good growth
• Blue-heavy: looks nice but grows plants less well

Low-Tech vs High-Tech Lighting

Low-tech (tanpa CO2)

Most Malaysian beginners start here. Choose a full-spectrum LED of moderate strength, run it 6–7 hours, and grow easy plants. Pair with root tabs or a light liquid fertiliser. See our guide to low-tech aquarium plants without CO2.

High-tech

For carpets and red stems, you need strong light, pressurised CO2 and regular fertiliser. These three must be balanced. More light without more CO2 just feeds algae. See our guide on how to set up CO2 for aquascapes.

Setup	Light	CO2	Fertiliser	Photoperiod
Low-tech	Low to medium	None	Root tabs, light liquid	6–7 h
Mid-tech	Medium	Liquid carbon or low CO2	Regular liquid dosing	7 h
High-tech	High	Pressurised CO2	Full EI or all-in-one	7–8 h

Types of Aquascape Lights

LED (most popular)

Slim, efficient and adjustable. Aquascaping brands such as Chihiros and WEEK are common choices among Malaysian aquascapers, alongside many budget LED bars. Look for models with dimming, a built-in timer and sunrise/sunset ramping. Browse LED Lamps.

T5HO (fluorescent)

Older but still effective for deep or large tanks. T5HO tubes give even light spread and good PAR, but run warmer, use more power and need tube replacement roughly yearly as output fades. Find them under T5HO Lamps.

Pendant / hanging LEDs

Popular for open-top scapes and rimless tanks. They spread light well and let heat escape, which helps in hot Malaysian rooms.

Lampu Aquascape Berapa Jam? Ramping Schedules

Plants don't need 12 hours of light. Most aquascapers use 6–8 hours at full intensity.

A sample schedule (with ramping):

Time	Light
1:00 pm	Ramp up from 0%
2:00 pm	100%
8:00 pm	Start ramping down
9:00 pm	Off

If you run CO2, switch it on about 1–2 hours before the light reaches full power, and off about an hour before lights out.

Why ramp?

• Fish aren't startled by sudden light.
• A softer start and finish look natural.
• It shortens the "full blast" period, which helps algae control.

Siesta (split photoperiod)

Some keepers split the day into two blocks with a 2–4 hour break. It's thought to slow algae, though results vary. It's fine to try, but a single 6–7 hour block is simpler.

Balancing Light and Algae

Problem	Likely cause	Fix
Green spots on glass and slow leaves	Light strong, plants slow	Shorten photoperiod; add fast growers
Hair algae on plants	Light too strong for CO2 / nutrients	Lower intensity; boost CO2 or cut light
Black beard algae	Unstable CO2 or poor flow	Steady CO2, better flow
Brown diatoms in a new tank	New tank silicates	Normal; fades in a few weeks
Plants pale, leggy	Too little light	Raise intensity or lower the light

See how to remove algae in an aquarium for treatment.

Malaysia-Specific Tips

• Heat: strong lights on a closed lid can push a tank above 30°C. Hang lights or leave the top open, and schedule the photoperiod in the evening.
• Sunlight: a tank near a window gets extra, uncontrolled light. Even an hour of afternoon sun can tip the balance towards algae.
• Humidity: Malaysian air is humid, and open-top tanks splash. Choose lights with a decent waterproof rating and keep adaptors dry.
• Power cuts: after a TNB outage, some lights reset their timer. Check the clock afterwards.

Choosing a Light for Your Plants

1. List the plants you want, then pick a light that matches their highest light need.
2. Match light length to your tank (60 cm light for 2 kaki).
3. Check PAR at your tank depth if the maker publishes it.
4. Look for dimming and timers, so you can start low and increase slowly.
5. If you're new, start at 50–70% brightness and raise it once plants are growing.

Browse plants matched to light levels under Aquatic Plants.

Frequently Asked Questions

Lampu aquascape perlu buka berapa jam sehari?

Kebanyakan aquascape perlukan 6–8 jam cahaya sehari. Untuk tangki baru, mula dengan 5–6 jam dan tambah perlahan-lahan. Gunakan pemasa (timer) supaya lampu buka dan tutup pada masa yang sama setiap hari.

Lampu biasa boleh untuk pokok aquascape ke?

Boleh untuk pokok yang perlukan cahaya rendah seperti anubias, java fern dan crypt, asalkan lampu itu jenis full spectrum. Tapi untuk pokok karpet dan pokok merah, anda perlukan lampu yang lebih kuat dan CO2.

What PAR do I need for carpet plants?

Usually about 50 µmol/m²/s or more at the substrate, along with pressurised CO2 and regular fertiliser.

Is RGB better than white for plants?

Both grow plants well. RGB lights often make plants and fish look more colourful, while white gives a natural look.

Why is my planted tank full of algae after I bought a stronger light?

Stronger light raises plant demand for CO2 and nutrients. If those don't increase too, algae takes over. Lower the intensity or shorten the photoperiod.

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Pick the right light for your scape from LED lamps and T5HO lamps, then browse matching aquatic plants from Malaysian sellers on FishyHub. Compare listings and RM prices, and ask sellers for PAR data where available.