I've been using a Sylvania 50 watt Spot-Gro indoor flood light between 12 and 14 hours a day for my VFTs. The first light lasted about 2 days. The replacement lasted maybe 3 days. Gonna go for another replacement tomorrow although I doubt that they'll be as cheerful replacing it this time around as they were the last time. Has anyone had any experiences with this particular brand and model of light bulb? Is what I'm experiencing the norm? - or just a fluke? Thanx.