Is it dark right now?
A new Ambient Light Sensor can help you with that question.
Identify by 820-2065-A printed on part. Includes cable
- 2.4, 2.5 or 2.6 GHz (Model A1260) 15" MacBook Pros
Option 1 / Used, fully tested
Lifetime Warranty - This iFixit product is guaranteed to function as long as you have it.