Question about Juwel Aquarium HeliaLux Spectrum 1200

I would recommend it, so you have enough light and can still influence it with a control unit. Vetches, thunderstorms, day-night, etc.

Hello,
Yes, this size is necessary because the length of your aquarium is 121 cm.
The quality of the light is great with this type of LED as opposed to the other solution which consists of replacing the neon tube with an LED tube.

Yes. I bought these for Rio240

Hello, if the aquarium has the size 121-55 then yes. Or the length is important 121 cm