Finding all 120 Lightroots in The Legend of Zelda: Tears of the Kingdom involves a strategic approach, leveraging the game’s mechanics and the relationship between Lightroots and shrines. Here’s a detailed step-by-step guide:

1. **Understand the Relationship Between Lightroots and Shrines**
Each Lightroot is directly below a shrine on the surface of Hyrule. This means you can find Lightroots by locating their corresponding shrines and then diving into The Depths below them.

2. **Locate Shrines on the Surface**
– **Use the Map:** Open your map and look for all 120 shrines scattered across Hyrule. Mark their locations on your map to keep track of where you need to go.
– **Interactive Map:** Utilize an interactive map that includes all shrine locations and Lightroot positions to help guide you through the process.

3. **Dive into The Depths**
– **Find the Entrance:** Locate the entrance to The Depths near each shrine. For example, if you’re looking for a Lightroot under Rito Village, find the small opening on the main Rito cliffside that leads to the corresponding chasm.
– **Glide and Navigate:** Use your glider to navigate through caves and chasms to reach The Depths. Be aware that some entrances might be hidden or require specific actions like gliding through water or navigating through narrow passages.

4. **Spotting Lightroots**
– **Look for Glow:** Lightroots emit a faint glow, making them slightly easier to spot. However, they can be hidden behind stone walls or in deep caverns, so keep an eye out for any light sources in The Depths.
– **Use Previously Activated Lightroots:** If you’ve already activated some Lightroots, use their light to guide you towards the next one. Since their light doesn’t overlap, you can use this method to narrow down your search area.

5. **Mark and Explore**
– **Mark Locations:** Once you spot a Lightroot, mark its location on your map so you can remember where it is.
– **Explore Carefully:** Approach the marked location cautiously, as some areas may be dark or have obstacles like stone walls or enemies.

6. **Activate Lightroots**
– **Activate Fast Travel Points:** When you find a Lightroot, activate it to create a fast travel point and light up the surrounding area. This will also clear away the Gloom, allowing Link to heal any missing hearts.

7. **Track Progress**
– **Keep Track of Activated Lightroots:** Use an interactive map to keep track of which Lightroots you’ve already activated and which ones are nearest to your current location.

8. **Reward**
– **Dispelling Darkness Medal:** Once you’ve activated all 120 Lightroots, you’ll be rewarded with the Dispelling Darkness Medal. While it doesn’t have any practical effects, the sense of accomplishment is the real reward.

By following these steps and leveraging the relationship between shrines and Lightroots, you’ll be able to find and activate all 120 Lightroots in The Legend of Zelda: Tears of the Kingdom.