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Home > Reading Comprehension > Word Parts > (Harry Potter) Lum and Luc


LUM and LUC mean LIGHT
In J.K. Rowling's Harry Potter series, "Lumos!"is used to turn the wand into a light source. "Light" is also used to describe the ability to see things in one's mind. A person with a light bulb turning on above his head is thinking of a good idea or putting ideas together; if you "see the light," you finally understand something that wasn't clear before. Many "luc" words involve this mental "light."


1. Write the word

2. Write what it means

3. Draw a picture to go with it

4. Answer the question about it.


meaning and example

what to draw

question to answer

(you may draw your answer, too)


1. to light up (the stadium was illuminated with floodlights)
2. (abstract) - to make something complicated easier to understand (to help someone "see the light")
3. (from medieval times) to decorate, especially a manuscript, with gold, silver, or bright colors, designs and pictures.

one example of each definitions

What are five different ways to illuminate a dark room?


a measurement of the brightness of light -- a 75 watt bulb could put out about 1200 lumens of light.

One light with a lot of lumens and one light without many lumens

Where are two places where you would want lower lumens instead of higher lumens?


light produced by a living thing, such as a firefly or some fish

two examples of bioluminescent animals

Would you like to be bioluminescent? Why or why not?


someone who is a leader ('a light showing the way') or is especially brilliant in their career.

Pick a career, and describe how you could become a luminary in that field.


allowing light through, but usually not allowing clear vision through. Many bathroom windows are translucent; thin cloth is, too.

something being translucent.

Why would someone want a window that let light through but that you couldn't see clearly out of?


1. Clear and understandable ("This math book is very lucid. The person who wrote it must be a luminary in teaching math!")
2. A person is lucid if they can think reasonably clearly and make sense; people who are not lucid might not know where they are or who they are.

What is a something you would like to be more lucid to you?


painter who makes a specialty of the effects of light on colored objects

a luminist at work

What are two things a luminist might paint?


to make something more clear; a teacher can "elucidate" what is required for an assignment or can elucidate a confusing concept.

What are three things a person might say if they wanted a teacher to elucidate something?


To think about and contemplate and work through until one understands (coming from the idea of staying up late and studying something by candle-light).

Someone elucubrating

What are two things a person who is elucubrating might do?


1. Letting light through completely and clearly.
2. Easy to understand; very clear.

Light going through something pellucid

1. How could you make your car or room window more pellucid?
2. What's the difference between pellucid and translucent ?

Complete these sentences with the "lum" or "luc" word that fits. Be sure to mix these sentences with words learned in previous lessons.

1. The __________________________ curtains let wispy light into the room.

2. In the deepest, darkest parts of the ocean, _________________________________ fish glow in the dark.

3. It took me hours and hours and many different books to _____________________________ that problem, but I have figured it out.

4.We are going to the art museum to look at a special collection of paintings by _______________________.

5. He doesn't just want to be good at writing; he wants to be a well-respected _________________________ in the writing profession.

6. Six floodlights suddenly switched on and ______________________ the entire field.

7. A floodlight sends out many more _______________________ than a candle.

8. I will keep explaining this until it is completely, totally ___________________________________ to you.

9. Here are the directions for building your boat. If the directions are hard to understand I will try to _____________________________ things for you.

10. The doctor checked to see if the injured man was __________________________ by asking him his name and what day of the week it was.


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