These lights are to normal lights what a Nobel Prize winner is to, well, you.
There's no shame in being told you're not as bright as the guy who discovered a new branch of physics. There's no shame in being told you're not as bright as the woman who opened up a whole new field of chemistry. If someone told you that you weren't as bright as the head of Military Astronavigation in the year 8168, you know what? That's fair! It's like saying "You are brighter than a cave dweller from the Ice Age." That's not insulting to the cave dweller! It's pretty much a statement of fact!
So us saying "These Mr. Beams Ultrabright Spotlights are brighter than most lights you own" is not at all an insult to those lights. Those lights are perfectly fine. They do a great job and we wish them well. But if you want the brightest light you can find? Those lights you already own aren't gonna do the job as well as the Mr. Beams Ultrabright Spotlights.
Unless the job is creating a whole new branch of physics. At that, light bulbs will all be pretty terrible.