Am I correct in assuming that an LED safelight emitting a wavelength of 660nm is safe for exposed and unexposed papers with a sensitivity of close to 660? I installed a LEDTronics BSD 1260 001AW red safelight and proceeded to expose Ilford MG IVRC to the source at full power. I used both exposed and unexposed paper. The distance from the safelight was FOUR INCHES. For FOUR MINUTES. Nothing. The MG IV sensitivity is around 560-580nm. Am I safe with other papers up to, say 640? If this is the case, these lights are valuable additions to the darkroom Yes they may cost 150 clams, but they last forever. Well, not forever, but 100,000 hours. That's over 11 years. And the light is unbelievable. Forget about indirect off the wall or ceiling. These can go direct. A non swiveling version costs $95, with a discount for volume. Am I missing something here? Is there a glaring flaw in my sophomoric enthusiasm?