The Lumenspars are an item that you need to collect in the Chasm area in order to upgrade the Lumenstone Adjuvant Gadget.
You will find multiple Lumenspars in the Chasm area but some of them are hidden in tricky places. This guide will show you how you can get all the Lumenspars in the Ad-Hoc Main Tunnel.
Lumenspars in Ad-Hoc Main Tunnel – Genshin Impact
⦿ LUMENSPAR #1
The very first Lumenspar you will get in the Ad-Hoc Main Tunnel is the Lumenspar that you need to investigate near the camp. This side quest is called Chasm Spelunkers and completing it will give you the first Lumenspar.
Below is the location of the other Lumenspars in the area.
⦿ LUMENSPAR #2
Use the left teleport waypoint in the Ad-hoc tunnel and head south to the marker. Glide down from a cliff to get the Lumenspar hanging on a hook.
⦿ LUMENSPAR #3
Head to the same teleport waypoint, head north to the marker. You can go here by going to your right from the teleport waypoint and entering the tunnel here.
The Lumenspar is near the gate.
⦿ LUMENSPAR #4
Go to the teleport waypoint on the right this time and head west. The Lumenspar will be on top of the broken wooden platform.
⦿ LUMENSPAR #5
Go back to the teleport waypoint and you should see a Lumenspar on your right side.
⦿ LUMENSPAR #6
Use the right teleport waypoint and head northeast to the marker. The Lumenspar will be on the ceiling.
⦿ LUMENSPAR #7
In the same area, head south. You need to glide down a cliff to get to the Lumenspar who is sitting on top of the wooden pole.