Energy savings, extra low mercury Operates on any Instant Start and Programmed Start Ballast;Reduce maintenance costs by extending the relamping cycle;Reduced impact on the environment without sacrificing performance; Starting voltage should be equal to or greater than 550V.These lamps are not recommended for use where the temperature in fixture is below 70F. Striations may occur where air movement is present in fixture. For best operation, use ballast with anti-striation circuitry. Philips Energy Advantage T8 lamps offer high energy savings without sacrificing performance. Save 7 watts and nearly $26 in energy costs over the life of the lamp when comparing the Energy Advantage T8 25W XEW to a standard T8 32W lamp**;Available in multiple wattages: 25W, 28W and 30W;Available in multiple color temperatures: 3000K, 3500K, 4100K, 5000K;** Based on wattage savings (7W) x rated average life (38,000 hours) x kWh rate ($ .10). Ideal for applications requiring maximum energy savings.