How well does aluminum foil block radiation?

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SUMMARY

Aluminum foil effectively blocks various types of radiation, including visible light and ultraviolet (UV) radiation emitted by 400-watt Metal Halide grow lights, specifically the "Neutral Deluxe" model. The outer glass shell of the bulb already provides a level of protection, but adding a makeshift aluminum foil wall enhances safety for individuals and nearby organisms, such as fish. The discussion confirms that while aluminum foil is not a perfect barrier, it significantly reduces exposure to harmful radiation.

PREREQUISITES
  • Understanding of electromagnetic radiation types
  • Knowledge of grow light specifications and safety
  • Familiarity with hydroponics systems
  • Basic principles of light filtration
NEXT STEPS
  • Research the effectiveness of different materials in blocking radiation
  • Learn about the health impacts of UV radiation exposure
  • Investigate safe distances for grow lights in indoor gardening
  • Explore advanced lighting options for hydroponics
USEFUL FOR

Hydroponics enthusiasts, indoor gardeners, safety-conscious individuals, and anyone concerned about radiation exposure from grow lights.

Raizy
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I bought one of them grow lights for hydroponics recently - 400 watts Metal Halide and I wanted to know if a makeshift aluminum foil wall would be good enough to block out the radiation coming from the lamp. I know the outer glass shell of the light bulb already acts as a filter but i just want to be extra safe. The position of the growing area is only 4 feet away from my computer desk and I will be exposed to this lamp for several hours a day.

Here are the wavelengths the light bulb emits (my bulb type is "Neutral Deluxe")http://www.sunmastergrowlamps.com/SunmSpecFam.html

EDIT: Furthermore, the fish will be near the light source aswell, will the fish get harmed?
 

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What radiation are you trying to block? It will certainly block visible light and UV.
 
Just the ones harmful to humans.
 

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