I'm currently using two timers on my Russian enclosure for his lighting. They are like the typical, standard timer pictured below. I have two different timers that constantly confuse me so I'm considering upgrading to digital ones. I would also like to set them in 15-minute intervals, instead of the standard 30-minute intervals (so hopefully digital ones can do that). I'm wondering if anyone has (1) any experience with digital ones; advantages / disadvantages; and (2) any suggestions for a particular product or a company that you like. Thank you in advance.