Lemon Glow is one of the only a few yellow flowering Camellias that I know of, and it's blooms are formal. It's very slow growing but definitely worth the wait. A faster growing yellow camellia is Jury's Yellow.
Be sure to use a well drained soil medium when planting any Camellia as they prefer fall planting with less watering than you might think. In NC our soil is clay so we prefer to use pine bark soil conditioner when planting Camellia, Rhododendron, Mountain Laurel, and Azalea.