Sobo T4-20 Aquarium Submersible Lamp 5.5W
The Sobo T4-20 is a 5.5W fully-submersible LED aquarium lamp for nano tanks 20–30 cm long, designed to sit underwater inside the tank and deliver bright light that deepens plant colour and makes red fish, shrimp and red-leaved stem plants stand out. Its sealed, waterproof tube mounts horizontally on suction cups, making it a versatile primary or accent light and one of the most affordable ways to light a small or nano aquarium in India.
Why choose the Sobo T4-20?
- Fully submersible, sealed design for underwater use, easy to tuck into a small tank.
- 5.5W energy-saving LED sized for 20–30 cm nano tanks.
- Rich colour rendering that lifts reds, greens and fish colour.
- Very low power draw and low heat, with a long service life.
- Suction-cup mounting for back-lighting or general illumination.
Specifications
| Brand | Sobo |
| Model | T4-20 |
| Power | 5.5 watts |
| Type | Submersible LED tube |
| Mounting | Suction cups (inside tank) |
| Suitable tank length | 20–30 cm |
| Best for | Nano, small planted and display tanks |
Which tanks is it best for?
The T4-20 suits nano tanks 20–30 cm long. As a submersible tube it makes great back-lighting or accent lighting and a primary light for low-light nano plants and small display tanks. For demanding plants in a nano, a top-mounted light such as the Sobo AL-180 gives more even coverage; see our planted aquarium lighting guide.
How to use it
Fix the lamp inside the tank on its suction cups, fully submerged, and run it 6–8 hours a day on a timer. Nano tanks are algae-prone, so keep the photoperiod tight, include a dark night period, and keep the tank out of direct sun. Handle and connect it with the power off and a drip loop on the cable. See waterproof and submersible aquarium lights.
Frequently asked questions
Is the Sobo T4-20 fully submersible?
Yes. It is a sealed, waterproof LED tube made to run underwater inside the aquarium on suction cups.
What tank size is it for?
Nano tanks 20–30 cm long. Larger tanks suit the T4-30, T4-40 or T4-50.
Can it grow plants?
It supports easy low-light nano plants and makes plant colour vivid. For demanding plants choose a stronger top-mounted light.
How many hours should I run it?
6–8 hours a day on a timer, with a dark night period — keep it tight on a nano tank to limit algae.
Where should I place it?
Mount it low or along the back on suction cups for back-lighting, or position it for general illumination.
Choosing a light? Read the complete aquarium light guide and what size aquarium light do I need.
Shipping & Returns
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We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.
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