If you’re a woman who’s ever gone shopping for a swimsuit in a department store, you know that lighting can make all the difference! This is as true for your home as it is for dressing rooms. On Oct. 30, Lumens Light + Living in midtown will be holding a free seminar on “8 Common Lighting Mistakes and How To Avoid Them.” Some things you’ll learn: how to use lighting to create mood and ambiance, energy-efficient lighting options, effective task lighting and more. Attendees receive a 20 percent off coupon toward their next single-item purchase at Lumens. And if that’s not enough to draw you in to a free seminar on a Saturday morning from 9 a.m. to 10 a.m., there will be complimentary coffee and pastries. Not bad for a seminar that’s already free. Space is limited, so RSVP by Oct. 28 by e-mailing Elizabeth Lake, Lumens Showroom Manager, at email@example.com. If you have questions or want to register by phone, call (916) 273-1160. Lumens is located at 2028 K St. (21st and K).