The diva candle, which stands for both enlightenment and celebration, has been used during various Indian festivals for generations. The chefs of Diva Indian Bistro hope to enlighten diners about the exceptional range of flavors and ingredients represented in Indian cooking.DIVA’S’ menu of more than 100 exciting dishes – all priced under $20 -- range from the regions of Madras and Bangalore to Mumbai, with tandoori specialties and share-able vegetarian platters galore, plus nightly chef’s choice options to keep things interesting. DIVA is located in Somerville’s Davis Square, a hip center of activity for young people about a mile from Harvard and Tufts universities. Open daily for lunch, dinner and takeout, its weekend brunch buffet is a new dining option that’s catching on.