You will be given a passage, and your task is to generate a Yes/No question that is answerable based on the given passage.

Q: LED grow lights vary in color depending on the intended use. It is known from the study of photomorphogenesis that green, red, far-red and blue light spectra have an effect on root formation, plant growth, and flowering, but there are not enough scientific studies or field-tested trials using LED grow lights to recommended specific color ratios for optimal plant growth under LED grow lights. It has been shown that many plants will grow normally if given both red and blue light. However, many studies indicate that red and blue light only provides the most cost efficient method of growth, plant growth is still better under light supplemented with green.

A: do red and blue led grow lights work?
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Q: In the Western tradition of surnames, there are several types of double surname (also double-barrelled surname). If the two names are joined with a hyphen, it may also be called a hyphenated surname.

A: do double barrelled names have to be hyphenated?
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Q: In the knockout stage, if a match was level at the end of 90 minutes of normal playing time, extra time was played (two periods of 15 minutes each), where each team was allowed to make a fourth substitution. If still tied after extra time, the match was decided by a penalty shoot-out to determine the winners.

A:
can round of 16 end in a tie?
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