# What is the brightest light? [closed]

I have been to wikipedia about intensity of light, and there are at least 20 different ways to classify it. So I guess it boils down to the formula E = hf, which is the energy of a single photon. Now past gamma rays, is there a maximum frequency, hence energy of a photon? How does what we can create in labs compare to what exists in outer space?

• I'm voting to close this question as off-topic because it's a trivia question that doesn't seem to relate to physical principles. – David Z Oct 27 '17 at 21:00
• We aren't to discuss physical phenomena in isolation? Without observation we may as well be mathematicians. Seems not fully rational(ised). – JMLCarter Oct 27 '17 at 21:34
• In regards to the last question, it's a fairly easy Google search away (e.g., see this PBS article). – Kyle Kanos Oct 29 '17 at 19:16
• Also, the first question is a dupe of this question. – Kyle Kanos Oct 29 '17 at 19:17

I'll suggest GRB 110918A, which had a peak luminosity of $L_{iso} = 4.7 × 10^{47}$ Watts. That a ten to the forty-seven - it isn't a typo.