When talking about channelling spiritual light, this refers to light that comes from the 6th dimension or above and is therefore only available to people who are initiated. There is also light on lower dimensions but this is not spiritual.
As with any form of channelling it is important to only do channelling work between 06:00 and 02:00, in other words: not when it is very dark. For more on this topic see the FAQ on channelling energy.
There have been times when there has been a need to channel spiritual light but it is not always the case and any work involving spiritual light should be orchestrated by the Spiritual Hierarchy who are the ones who grant access to the spiritual light.
Only initiates can actually channel spiritual light because it requires the crown chakra to have been opened. Even if you are initiated the following must be observed though: