You can place redstone torches and torches on glass, so they should also be placable on glowstone and sea lanterns.
As a side note, torches would also fit nicely on anvils.
Relates to MC-70057.
Linked issues
Comments 3
Dupe of MC-9436.
MC-72556
Can't place (redstone) torches on glowstone or sea lanterns
Resolved
Duplicate
0
[Mod] redstonehelper
(Unassigned)
Unconfirmed
Minecraft 1.8
Retrieved
Redstone torches and regular torches not being placable on glowstone is intended. See MC-9436