Telling Time During the Noontide of Valinor
One of the obviously frustrating parts of telling a pre-Sun story is the entire concept of the passage of time, and how you would count 'years' or even 'days'. When trying to sort out daily life - when does it begin? What does it look like during the mingling of the lights? How bright is it at the various times of the day? How does the existence of 'Treelight' affect our storytelling, if at all?
As you know, Telperion was made first, and then Laurelin, so the 'earlier' part of the day is dominated by silver light, and the latter part of the day by golden light. But they both wax and wane, so it's a bit more complicated than that.
12 hour day
1st hour: Telperion waxing, Laurelin dormant
2nd hour: Telperion waxing, Laurelin dormant
3rd hour: Telperion full strength, Laurelin dormant
4th hour: Telperion waning, Laurelin dormant
5th hour: Telperion waning, Laurelin awakens
6th hour: 1st mingling of the lights: Telperion fading, Laurelin waxing
7th hour: Telperion dormant, Laurelin waxing
8th hour: Telperion dormant, Laurelin waxing
9th hour: Telperion dormant, Laurelin full strength
10th hour: Telperion dormant, Laurelin waning
11th hour: Telperion awakens, Laurelin waning
12th hour: 2nd mingling of the lights: Telperion waxing, Laurelin fading
The 'brightest' time of day would seem to be the 9th hour, when the brighter Laurelin is at full strength, and the dimmest, most twilighty time of day would be the 12th hour, during the 2nd mingling of the lights, as Laurelin fades out and Telperion is still at (relatively) low strength. But in Valinor proper, it never gets dim enough to see the stars overhead. As beautiful as they are, the Trees cause serious light pollution!
It's a good thing elves don't need to sleep, or else all elf-children would need room-darkening shades.
Okay, all my snark aside, this is *not* what a day with sunlight is like. There is no 'morning' nor 'evening' here - nightfall doesn't come until the destruction of the Trees. So...how does this impact elvish culture? Surely they refer to time passing based on the Trees, just as we would refer to morning and afternoon. What do elves in Valinor say to each other instead of 'good morning?' (which might explain why Gandalf took the phrase so seriously!)