For Lent, let's give up waste--abstain from wasting photons! Light pollution impinges on the natural order. Here are 100-plus ideas to lessen your impact on the night sky.
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100+ Ways to Give Up Light
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Value the night; go with less light.
"Featuring a list of action items, Light Fast combines secular and sacred endeavors to conserve light at night. Light Fast entreats you to take inventory of your light consumption, pare your waste of photons, and enlist others to value darkness for the benefit of creation. Whereas some people give up a vice for Lent, only to return to consumption afterward, Light Fast encourages you to give up wasteful light for good--'for good' in the sense of forever as well as 'for good' in the sense of for the goodness of all."
-From blog post Light Fast Encourages Awe and Wonder