Okay... I bought 4 of the Eveready energy saving GU10's, and here are my thoughts on them. They are significantly "whiter" than the Megaman energy saving GU10s, and don't seem to give quite the same amount of light. To be brutally honest, the light is quite horrible! The Megamans are much closer to the "yellowish" light of halogen bulbs, a much "softer" light than the Eveready bulbs give. In terms of starting time, the Eveready bulbs kick in a fraction of a second quicker than the Megamans (i.e. no significant difference), and both take a minute or so to reach full brightness (but the initial brightness of both is more than enough to see). So... in future it will be the Megaman's (warm white version, 2700K, as opposed to the whiter 3500K of the Evereadys) for me. And they are effectively the same price as the Eveready bulbs... twice the price, but twice the life. I have had 8 Megaman bulbs that have had extensive use over the last year or so, and none have failed yet.