Pleased to read more and more cyclists use day lights--but most of the danger comes from the front, so a good and bright blinking white light for the front helps in making drivers aware of you when making a turn in front of you from the opposite lane or the infamous "right hook" or simply cutting you off!

Found at Costco a relatively inexpensive light that is very bright and last about 90 miles, so I always cary 3 AAA spare batteries with me and for the rear I use a "planet bike" light. Plus I use well integrated red fenders with reflective tape--anything will help--but for some reason there is still the not so pleasant driver here or there, but much less with the lights!

But it looks dorky if not very dorky--but I don't care anymore because as I am getting older self preservation seems to prevail more and more!

Stay safe out there!