Quote:
Originally Posted by medicineman
If you happen to ever been in Singapore's Changi airport, you might remember this indoor fern garden with a koi pond by the terminal. The lighting is supplied by many metal halide downlight very far away (something like 18+ feet away). Yet it is enough to sustain the life of all tree ferns and other kind of ferns (yes, they are real and alive!! and they've been there for more than a year without dying) far below.
Looking at my project condition, metal halide is the only obvious option. With natural sun lighting condition and the nature of plants (non high light plants) to be considered, I'd say 400W bulb would be sufficient to punch through the distance and depth. Two of such bulb would be more than enough to cover the pond evenly.
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For a moment there,i thought the lights that were providing lighting for the plants at Changi airport were normal lights until you highlighted the fact that they were actually metal halides..It slipped my mind for ahwile there. Finally there is an answer to my all time question about how they managed to keep the plants alive in there and yes,they are real living plants.
Hmm,would exposing your pond to direct sunlight be a risk in terms of algae problem? I would most probably go with the metal halide option as it allows you to restrict the amount of light that your setup receives. At the same time,have you considered other forms of lighting say coloured lights or night lights to further enhance the look of your mega project during different times of the day?