<p>From watching the anime, we don’t always get insight into Light’s complete train of thought,<sup>[1]</sup> we only always get to know his conclusion. So those parts of this answer that concern his thoughts are partly based on speculation, depending on what is revealed to the viewer and what is not.</p>

<p>One of Light’s main objectives is to create a utopia<sup>[2]</sup> in which crime has been eradicated because all criminals are dead. In this utopian world, he — having the power to decide over life and death — would be the unquestioned ruler of all. Pretty much the entire story up to L’s death and Mello and Near’s appearance shows his slow gain of power all as part of his cunning and thoughtful plan.</p>

<p>For most of the early storyline, Light has access to the police’s database through his father<sup>[3]</sup> allowing him to see both name and face of his victims. While he pretty much instantly acknowledges the power of the Shinigami Eyes, he <em>does</em> get on pretty well without them.</p>

<p>Two points are key points as to why he decides to refuse the Eye deal. The first one is the result of the second paragraph. Light likes being in control, he likes the power. He knows that it will take years to build up his utopia and he wants to enjoy it to the fullest. <strong>All of the lifespan he would lose in the deal</strong> would be during his rulership. So he’s not just losing half, he is effectively losing more of the ‘good’ time.</p>

<p>The second is the result of the third paragraph. Light is a very bright pupil and underchallenged. He is fascinated by overcoming the obstacles placed in his path. Remember the scene when his room was bugged: he accepted the challenge and continued writing in the death note <em>without the police realising he was doing so.</em> While he could have had his way easily by trading half his lifespan and killing L on first site, it just wouldn’t fit his personality. He would much rather do things the hard and rewarding way.</p>

<p>Note, however, that he does take the easy (or seemingly easy) opportunities if they are presented on a silver plate. When Misa (who he by then has established to be the other death note owner and of whom he knows she traded her lifespan) visits him at the university and gets a glance of L, he immediately tries calling her to ask for his name. He doesn’t even really bother properly leaving L’s earshot to make the call. He probably thought his patience had finally been rewarded and he were now a step closer to the goal. (Ultimately though, this fails because L was already suspicious of Misa and relieved her of her phone.)</p>

<hr>

<p><strong>Notes:</strong></p>

<p>[1]: I would be surprised if the manga were any different.</p>

<p>[2]: Whether this is utopia or distopia is opinion-based.</p>

<p>[3]: I believe, without his father knowing.</p>

CC BY-SA 3.0
2016-09-13T20:01:53.220Z
2016-09-13T20:01:53.220Z
Jan
<p>Light wanted to create an utopian world with no crime, and he wanted to <em>Rule the world he created</em>
So he needed to live to rule and did not want to shorten his lifespan.</p>

CC BY-SA 3.0
2016-09-16T06:36:55.993Z
2016-09-16T06:36:55.993Z
telekineser
<p>From the <a href="http://deathnote.wikia.com/wiki/Light_Yagami" rel="noreferrer">Death Note Wikia</a>:</p>

<blockquote>
  <p>Ryuk offers to make a deal with Light for the “Shinigami Eyes.” Light refuses the deal, stating that <strong>he needs to live in order to rule over his utopian world</strong>. He asks Ryuk if there is anything else that he should know about the Death Note, and Ryuk says probably not. </p>
</blockquote>

CC BY-SA 3.0
2013-12-25T07:46:55.500Z
2016-01-11T01:56:12.297Z
2016-01-11T01:56:12.297Z
Cyclone
<p>Why didn't Light Yagami use the Shinigami eyes? Couldn't it have been an easy task for him? Was it his arrogance and overconfidence? </p>

<p>Alternatively, was he not willing to sacrifice half his lifespan, thinking it would be a loss for him?</p>

<p>Wouldn't it have been a wiser step to choose the Shinigami eyes and make life easier than playing and risking around his life? </p>

CC BY-SA 3.0
2013-12-31T03:34:56.407Z
I think this was pretty obvious (no offense), since Light says so multiple times. Also, if you think about it carefully, there was not really an instance where the Shinigami's eyes would have given him an advantage.
Secret
CC BY-SA 3.0
2013-12-31T08:08:53.193Z
@Secret, what are you saying? He would have killed L a long long time ago! Even he could have avoided that incidence with "N". Simply could have seen his face and then later written his name in note..
Rookie Programmer Aravind
CC BY-SA 3.0
2013-12-31T08:09:26.430Z
one this I observed is he was damn confident about his capabilities and thinking power..
Rookie Programmer Aravind
CC BY-SA 3.0
2013-12-31T08:17:34.753Z
Yeah, that is correct too I think, he is overconfident. There was no advantage the eyes could have given him because, even if he knew L's name, L arranged it that if he dies, Light becomes the prime suspect.
Secret
CC BY-SA 3.0
2013-12-31T08:18:26.307Z
Nope! Not when he met for first time..
Rookie Programmer Aravind
CC BY-SA 3.0
2013-12-31T08:19:40.543Z
Knowing the name was the tricky part everytime for Light, also that's the reason Anime was interesting.. Again! If you know the name you could kill the person anytime! Choose a time when no one suspects you could be..
Rookie Programmer Aravind
CC BY-SA 3.0
2013-12-31T08:20:46.110Z
L met Light coz, he was sure that Kira needs name + person's face to kill him..
Rookie Programmer Aravind
CC BY-SA 3.0
2013-12-31T08:25:17.283Z
Actually, if I remember correctly, the moment Light meets L, Light has a breakdown because he knew he can't do anything to this guy -> Assuming he is the true L, If he died after he introduced himself to Light, it becomes obvious that he is Kira. That's why he was so pissed at that moment. The only time I think he would have really proven to have used that was on Naomi (but note he gets around it too)
Secret
CC BY-SA 3.0
2013-12-31T10:01:49.647Z
it wouldn't have made sense if he had killed each person right after he met .. I'm sure Light was quite intelligent to understand this.. That's why I said .. "choose a time so that no one suspects you"!
Rookie Programmer Aravind
CC BY-SA 3.0
2013-12-31T10:02:20.227Z
If it was not about exchanging for half of the life span .. I'm sure Light would have gone for it .. And certainly the plot could have been changed .. Light knew to manage and use things around him..
Rookie Programmer Aravind
CC BY-SA 3.0
2014-01-24T16:29:35.487Z
Additional caveat: You don't even know your original lifespan before you agree for the deal. If you're past halfway, you fall dead the moment the agreement comes into effect! (which, considering Light's life was ended without that deal not all that much later, was the case!)
SF.
CC BY-SA 3.0
2014-03-12T08:28:56.257Z
Why do questions keep getting negative votes without the reason being mentioned by downvoters??
Rookie Programmer Aravind
CC BY-SA 3.0
2015-08-15T23:39:18.800Z
plus a lot of Light's motivation was to demonstrate his intellectual superiority over the police, L, Near, etc. Taking the eyes would've been the easy way out - by not doing that, he was forced into relying on his own skills and resources (mostly). Much more of a thrill and a sense of accomplishment that way!
Meir Illumination
CC BY-SA 3.0
2016-01-10T18:13:39.230Z
I don't recall this being the case. What did L do to prevent him from using them?
senshin
CC BY-SA 3.0
2016-01-10T20:18:52.720Z
The issue of the Shinigami Eyes came up _before_ L was involved with Light, iirc.
Maroon
<death-note>
Why didn't Light use Shinigami eyes?
# Why didn't Light use Shinigami eyes?
Posted by: username_0 on 2013-12-25
Why didn't Light Yagami use the Shinigami eyes? Couldn't it have been an easy task for him? Was it his arrogance and overconfidence?

Alternatively, was he not willing to sacrifice half his lifespan, thinking it would be a loss for him?

Wouldn't it have been a wiser step to choose the Shinigami eyes and make life easier than playing and risking around his life?
**Tags:** death-note
> **Comments:**
> **username_1**: I think this was pretty obvious (no offense), since Light says so multiple times. Also, if you think about it carefully, there was not really an instance where the Shinigami's eyes would have given him an advantage.  
> **username_0**: @Secret, what are you saying? He would have killed L a long long time ago! Even he could have avoided that incidence with "N". Simply could have seen his face and then later written his name in note..  
> **username_0**: one this I observed is he was damn confident about his capabilities and thinking power..  
> **username_1**: Yeah, that is correct too I think, he is overconfident. There was no advantage the eyes could have given him because, even if he knew L's name, L arranged it that if he dies, Light becomes the prime suspect.  
> **username_0**: Nope! Not when he met for first time..  
> **username_0**: Knowing the name was the tricky part everytime for Light, also that's the reason Anime was interesting.. Again! If you know the name you could kill the person anytime! Choose a time when no one suspects you could be..  
> **username_0**: L met Light coz, he was sure that Kira needs name + person's face to kill him..  
> **username_1**: Actually, if I remember correctly, the moment Light meets L, Light has a breakdown because he knew he can't do anything to this guy -> Assuming he is the true L, If he died after he introduced himself to Light, it becomes obvious that he is Kira. That's why he was so pissed at that moment. The only time I think he would have really proven to have used that was on Naomi (but note he gets around it too)  
> **username_0**: it wouldn't have made sense if he had killed each person right after he met .. I'm sure Light was quite intelligent to understand this.. That's why I said .. "choose a time so that no one suspects you"!  
> **username_0**: If it was not about exchanging for half of the life span .. I'm sure Light would have gone for it .. And certainly the plot could have been changed .. Light knew to manage and use things around him..  
> **username_2**: Additional caveat: You don't even know your original lifespan before you agree for the deal. If you're past halfway, you fall dead the moment the agreement comes into effect! (which, considering Light's life was ended without that deal not all that much later, was the case!)  
> **username_0**: Why do questions keep getting negative votes without the reason being mentioned by downvoters??  
> **username_3**: plus a lot of Light's motivation was to demonstrate his intellectual superiority over the police, L, Near, etc. Taking the eyes would've been the easy way out - by not doing that, he was forced into relying on his own skills and resources (mostly). Much more of a thrill and a sense of accomplishment that way!  
> **username_4**: I don't recall this being the case. What did L do to prevent him from using them?  
> **username_5**: The issue of the Shinigami Eyes came up _before_ L was involved with Light, iirc.  
---
## 3 answers
### Answer by username_8 on 2013-12-25. Score: 22 | Accepted answer
From the [Death Note Wikia](http://deathnote.wikia.com/wiki/Light_Yagami):

> Ryuk offers to make a deal with Light for the “Shinigami Eyes.” Light refuses the deal, stating that **he needs to live in order to rule over his utopian world**. He asks Ryuk if there is anything else that he should know about the Death Note, and Ryuk says probably not.
---
### Answer by username_6 on 2016-09-13. Score: 2
From watching the anime, we don’t always get insight into Light’s complete train of thought,[1] we only always get to know his conclusion. So those parts of this answer that concern his thoughts are partly based on speculation, depending on what is revealed to the viewer and what is not.

One of Light’s main objectives is to create a utopia[2] in which crime has been eradicated because all criminals are dead. In this utopian world, he — having the power to decide over life and death — would be the unquestioned ruler of all. Pretty much the entire story up to L’s death and Mello and Near’s appearance shows his slow gain of power all as part of his cunning and thoughtful plan.

For most of the early storyline, Light has access to the police’s database through his father[3] allowing him to see both name and face of his victims. While he pretty much instantly acknowledges the power of the Shinigami Eyes, he *does* get on pretty well without them.

Two points are key points as to why he decides to refuse the Eye deal. The first one is the result of the second paragraph. Light likes being in control, he likes the power. He knows that it will take years to build up his utopia and he wants to enjoy it to the fullest. **All of the lifespan he would lose in the deal** would be during his rulership. So he’s not just losing half, he is effectively losing more of the ‘good’ time.

The second is the result of the third paragraph. Light is a very bright pupil and underchallenged. He is fascinated by overcoming the obstacles placed in his path. Remember the scene when his room was bugged: he accepted the challenge and continued writing in the death note *without the police realising he was doing so.* While he could have had his way easily by trading half his lifespan and killing L on first site, it just wouldn’t fit his personality. He would much rather do things the hard and rewarding way.

Note, however, that he does take the easy (or seemingly easy) opportunities if they are presented on a silver plate. When Misa (who he by then has established to be the other death note owner and of whom he knows she traded her lifespan) visits him at the university and gets a glance of L, he immediately tries calling her to ask for his name. He doesn’t even really bother properly leaving L’s earshot to make the call. He probably thought his patience had finally been rewarded and he were now a step closer to the goal. (Ultimately though, this fails because L was already suspicious of Misa and relieved her of her phone.)

---

**Notes:**

[1]: I would be surprised if the manga were any different.

[2]: Whether this is utopia or distopia is opinion-based.

[3]: I believe, without his father knowing.
---
### Answer by username_7 on 2016-09-16. Score: -1
Light wanted to create an utopian world with no crime, and he wanted to *Rule the world he created*
So he needed to live to rule and did not want to shorten his lifespan.
---
