I've recently become a fan of the Black Diamond Apollo LED lanterns for camping use. They're only 3W, and the total light emitted isn't as high as from some of the competitors, but what makes them great is that the mirrors and lenses are shaped perfectly so that it evenly illuminates a tabletop-sized work area, and throws no light upwards. The focusing is easily the most important aspect of the product.

However, it seems quite plausible that the different spectrum of LEDs could affect the perceived brightness, particularly if you're wanting the diffuse reflection from LED spotlights to act as ambient lighting.