After finding out that Philips developed extreme energy saver T8 fluorescent tubes known as “power saver sets” that come with electronic starters with 12w T8 tubes that replace F18T8 and F20T12 tubes, 23w T8 tubes that replace F36T8 and F40T12 tubes, 37w T8 tubes that replace F58T8 and F65T12 tubes, and 63w T8 tubes that replace F70T8 tubes, I have been wondering whether the starters that come with the 12w T8 power saver sets can be used in a twin F18T8/F20T12 series preheat installation on a F40T12 preheat ballast.