Lent is not a "celebratory" season even minus the Sundays in it tho Sundays are always resurrection services. "Hallelujahs" are suspended even on Sundays in Lent. A lot of the hymns, songs are in minor keys-but you could use something like "On Eagles Wings" which fits the season based on the psalm quoted for Jesus to jump off the temple-lest you dash your foot against a stone...eh? Thats a good tune not a dirge. Just a suggestion....