Question about Juwel Aquarium HeliaLux Spectrum

Fresh water works just as well. But what is important to know. The lamps are notoriously leaky. I bought 1x 1200mm and 2x 1500mm versions of them. All of them leaked water inside due to capillary action (air stone). Absolutely absurd for a lamp that costs over 300 francs. Really poor support from Juwel. So think carefully about whether you really want the lamp

I would rather advise against saltwater use as there are better lamps for saltwater, but it seems to me that you have not yet dealt with the topic of lighting enough to get an aquarium.

I use it for fresh water.