White knights also come in a Proselyte form which are level 38, an Acolyte form which is level 39. Also note that if you have a level from killing black knights it will go down if you kill whites knights.
A good way to train on White knights is to change your respawn point to Falador. You must be a member and have completed the Recruitment Drive quest to do this. Take only one item with you so that when you die, you spawn right back to where you were.
A White Knight partisan.
Bones (100%), Coins (8-52), Blood rune (2-3), Mind runes (7), Chaos runes (3), Law runes (3), Nature runes (7), Sweetcorn seeds (3) Body rune (13), Onion seed (4), Cabbage seed (4), Grimy herbs, Uncut gems, Tomato seed (3), Iron bar (2), Steel sword, Mithril arrows, Adamant arrows.