 Shares of Lumentum Holdings Inc. sank 6.5 toward a seven-month low in premarket trading Wednesday, after the optical and photonic products company reported a fiscal third-quarter profit that matched expectations but revenue that missed, citing deployment delays in China, and provided a downbeat outlook. Net income jumped to 225.5 million, or 2.85 a share, from 43.4 million, or 56 cents a share, in the year-ago period. 