3 ms·

I do not understand the assumptions behind this question. Can you clarify what you mean?

• baq 5y ago
  Is a red bulb enough or do you need a 670nm laser?
  • tlrobinson 5y ago
    I hope this was a joke. Don’t shine lasers in your eyes. https://en.wikipedia.org/wiki/Laser_safety https://en.wikipedia.org/wiki/Laser_safety
  • flyinglizard 5y ago
    For the love of all that’s dear in this world, please don’t use a laser for that. If you’re in a DIY mood, you can easily pick LEDs around that wavelength and they would generate more than enough light to even cause damage (if close enough).
• andrew_ 5y ago
  what assumptions? it was an honest question.