Sobo T4-50 Aquarium Submersible Lamp 9 watts

The Sobo T4-50 is a 9W fully-submersible LED aquarium lamp for tanks 50–60 cm long, designed to sit underwater inside the tank and deliver high-output 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 a popular budget choice for planted and display tanks in India.

Why choose the Sobo T4-50?

• Fully submersible, sealed design that runs underwater and is easy to position low in the tank.
• 9W high-output LED for tanks 50–60 cm, bright enough for display and easy plants.
• Rich colour rendering that makes reds, greens and fish colours much more vivid.
• Energy-efficient and low-heat, with a long service life.
• Flexible mounting via suction cups for back-lighting or general illumination.

Specifications

Which tanks is it best for?

The T4-50 suits tanks 50–60 cm long. As a submersible tube it is ideal as bright back-lighting or accent lighting that makes colours pop, and as a primary light for low-light plants and fish-only display tanks. For demanding plants, a top-mounted full-spectrum planted light such as the Sobo AL-480 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. Always include a dark night period and keep the tank out of direct sunlight to control algae. As a sealed submersible unit it is built for underwater use, but always 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 T4-50 fully submersible?

Yes. It is a sealed, waterproof LED tube designed to run underwater inside the aquarium on suction cups.

What tank size is it for?

Tanks 50–60 cm long. For smaller tanks choose the T4-40, T4-30 or T4-20.

Can it grow plants?

It supports easy low-light plants and makes plant colour vivid. For demanding plants a stronger top-mounted planted light is better.

How many hours should I run it?

6–8 hours a day on a timer, with a dark night period to keep algae in check.

Where should I place it?

Mount it low or along the back on suction cups for dramatic 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.