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WikiCards · Card list · Science cards · Lumen
Uncommon card · Science
Lumen, an Uncommon card
The lumen is the SI unit of luminous flux, which quantifies the perceived power of visible light emitted by a source.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 59
- DEF
- 45
- Power
- 104
- Wikipedia reads a year
- 130,000
Power 104 (ATK + DEF): stronger than 45 % of WikiCards cards.
Lumen quiz: 3 questions
Three questions on the Lumen card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
Luminous flux differs from power, which encompasses all ______ waves emitted, including non-visible ones such as thermal radiation.
Answer
electromagnetic. Luminous flux differs from power, which encompasses all electromagnetic waves emitted, including non-visible ones such as thermal radiation. From the Lumen article on Wikipedia.
Which of these Wikipedia articles is read the most in a year?
Answer
Russian roulette. Russian roulette 270,000 · Lumen 130,000 · Subset 97,000 · Small nuclear ribonucleoprotein D1 290 Wikipedia reads over a year.
In a duel, each round asks a question like these about the opposing card, with 15 seconds to answer.
The facts on the card
The card carries these facts from its Wikipedia article.
- Luminous flux differs from power, which encompasses all electromagnetic waves emitted, including non-visible ones such as thermal radiation.
- By contrast, luminous flux is weighted according to a model of the human eye's sensitivity to various wavelengths, this weighting is standardized by the CIE and ISO.
- The lumen is defined as equivalent to one candela-steradian: A full sphere has a solid angle of 4π steradians, so an isotropic light source with a luminous intensity of one candela has a total luminous flux of One lux is one lumen per square metre.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Lumen article was read about 130,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 59 and blocks with 45: each hit it takes is cut by 18 %.
How to get Lumen
Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.
More Science cards
Cards close in power
The cards just above and just below Lumen in the power ranking, all domains together.
- IcingUncommon · Society · ATK 59 DEF 45
- Greater AntillesUncommon · Nature · ATK 61 DEF 43
- Ira LevinUncommon · History · ATK 60 DEF 44
- Mladen ŽižovićUncommon · Society · ATK 61 DEF 43
- Battles of the IsonzoUncommon · History · ATK 62 DEF 42
- Kamakhya–Howrah Vande Bharat Sleeper ExpressUncommon · Society · ATK 63 DEF 41
Card lists
- Wikipedia quizNew questions every day
- All cards from A to ZEvery card, by name
- Science cards
- Legendary cards
- Tier listS and A tiers by power (ATK + DEF)
Credits
Text : Wikipedia, Lumen (revision), CC BY-SA 4.0. Photo : C DIMEY 5252, CC BY 4.0, Wikimedia Commons.
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