I needed an MR-11 10 watt / 12 volt light bulb to replace the light bulb in my fiber optic Christmas tree that blew out just before the New Year holidays (of course!). At 90 lumens, I wasn't sure the Philips 417220 would be up to the task. To my great surprise, not only did it work great, it might even be a little brighter than the original bulb it replaced! Once again we are enjoying our fiberglass tree in all its glory! Very happy with this product.