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I think that based on all the things I've read from my other friends - we can use solar panels, LED energy saving bulbs , those that have more electricity converted to more light energy than heat energy- as the purpose of the light bulbs are to provide light and not heat. We can also place the bulbs in a parallel arrangement thus all the bulbs will be at an equal brightness yet use a lesser amount of energy. Wind turbines are in fact a good idea however it may have a slight limitation as in Singapore we may not have enough space and the wind power may not sufficient. I also think that the lighting design is important, maybe we could have the Christmas lights to be evenly spread across the Christmas tree so it will still look pretty and in addition be completely lit up.

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We can use solar panels, parallel circuits, led lights and energy saving bulbs. I researched and found out that some of the top few energy saving bulbs of 2017 are the Cree 9.5 watt, and the Philips LED 425264.

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we could use led bulbs

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we could put solar panels inside of the trees and then the light energy from the lights would power the solar panels which could in turn power the next nights lights. we could also use LEDs. And you could put turbines in the gutter so that any water moving could partially help to power the lights!

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Just like some of us has mentioned, I think that by using solar panels to power the decorations, much electricity can be conserved. The solar panels can be charged during the day and the stored light energy can be converted to electrical energy to be used at night.

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Use solar panels to power the decorations
(It can be charged during the day since we only need the light decorations at night)

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Use LED bulbs.

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we should use parallel circuits.

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Use led lights

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maybe use wind turbines for like 10weeks before putting up the tree and save the electricity generated so there will be enough energy.....

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use electricity saving bulbs

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-solar panels (charged before night)

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-eco-friendly
-reduce harm to environment
-energy saving