Sculk Shriekers are not able to trigger a warden to spawn on a block that is greater than 11 on the Java Edition, however it can on the Bedrock Edition. This includes light from daylight as well as light from light emitting blocks.

Steps to reproduce:

1. Place a sculk shrieker in an environment where the light level is greater than 11. This can be either be natural light or light from a light-emitting block. 
2. Observe the Warden spawning.