Lydia
The Brightener, Lady of Enlightenment

Lesser Goddess, Suel pantheon (known to other regions) [Lesser]
Goddess of Music, Knowledge, Daylight

Symbol Spray of vivid colors  
Alignment Neutral Good  
Priest Alignment NG, LG, CG  
Plane Elysium  
Worshippers Musicians, sages, scholars, many bards  
Race Human, half-elf  
Sex Any (80% female)  
Attributes Intelligence 15, Wisdom 13 -2
Proficiency Groups Wizard, Priest, General 5
Bonus Proficiencies Sage knowledge (of the player's choice), Musical Instrument, Singing 8
Preferred Weapon None (generally spells)  
Allowed Weapons As wizard -5
Armor Leather or padded armor, no shield -15
Primary Sphere Divination 10
Major Spheres All, Astral, Charm, Creation, Guardian, Necromantic, Protection, Sun, Thought 70
Minor Spheres Healing, Time, Wards, Weather 20
Additional Spells Commune with Nature (5th level), Messenger (2nd level), Prismatic Spray (7th level, as 7th level Wizard spell) 2
Abilities
  Turn Undead 15
  No followers  
  Neutral Good clerics of Lydia may use a special form of the commune spell: they may ask three questions, and if they are clearly and fairly worded, receive a verbal answer that takes no more than two minutes to deliver (this is exempt from the normal yes/no limit). Use of communing with Lydia (not her servants) more often than once per week or for selfish purposes may result in a loss of clerical abilities 10
1st level Detect Magic (1/day)
5 (1/day) + 1 (P1) - 0 (1st level) - 4 (5 powers) = 5 (minimum)
5
4th level Augury (1/day)
5 (1/day) + 2 (P2) - 1 (4th level) - 4 (5 powers) = 5 (minimum)
5
6th level Divination (1/day)
5 (1/day) + 4 (P4) - 2 (6th level) - 4 (5 powers) = 5 (minimum)
5
8th level Locate Object (1/day)
5 (1/day) + 3 (P3) - 3 (8th level) - 4 (5 powers) = 5 (minimum)
5
12th level Commune with Lydia or her servitors (1/day), see below
5 (1/day) + 5 (P5) - 5 (12th level) - 4 (5 powers) = 5 (minimum)
5
Limitations
  Before praying for spells, the priest must spend 30 minutes giving information about what he or she has learned to Lydia -3
  Hit points (d6) and THACO as thief -20
Raiment Long flow robes of bright and vivid colors, bare head preferred  
Animal Songbirds of any sort  
Holy Days During rainbows, prayer and meditation outdoors  
Notes
Formal worship of Lydia is always held outdoors or in open-air courtyards (though prayer is usually done indoors)
Lydia's priests are usually non-combatant
Lydia has few temples in the Flanaess. The major temples are in Lo Reltarma, Niole Dra, Gryrax, Nellix and Pitchfield
Lydia is well-loved by Suel musicians (and non-Suel musicians to a lesser extent)
Neutral Good followers of Lydia may (if sufficiently faithful) gain the answer to a single question one in their lifetimes, through prayer
Background
Lydia, Suel god of Knowledge and Music, is the guardian of the learning of the Suel people. She taught the first musicians of the Suel, and schooled them in the arts of bardic magic and lore. Her priests are taught that learning must be stored in the heart and in song, not just written in books, for knowledge without wisdom is of no value. She possesses a lesser attribute as the power of Daylight, symbolizing the triumph of enlightenment over ignorance and superstition.

Though Lydia has few priests and fewer temples, she is well-loved by the Suel people. Nearly all Suel musicians (of good or neutral alignment) revere her, and pray to her for inspiration in their singing. She is well-regarded in the barbarian north, where she is known as the First Skald, the one who taught the songs of legend to their people. Her large temples are bastions of learning and art, and are often sought out by those in search of ancient lore.

Sources
Dragon #92, Gods of the Suel Pantheon (original source)
Len Lakofka's GreyTalk posts on the Suel Pantheon
Guide to the World of Greyhawk, p. 63