Ministerio de Economía y Competitividad Gobierno de Canarias Universidad de La Laguna CSIC Centro de Excelencia Severo Ochoa

OTPC

Light pollution

Light Bulbs

The least damaging bulbs for Astronomy are the most energy-efficient available. The most damaging are those that emit ultraviolet light, as light at these wavelengths is the most strongly dispersed in the atmosphere and has no value in terms of lighting.

Sodium lamps:
The least polluting lights are low pressure sodium lamps as they emit almost all of their light in a single line of the spectrum, leaving the rest undisturbed. They are also the most energy efficient, consuming 5 times less than incandescent bulbs, 2.2 times less than mercury and 1.5 times less than high pressure sodium and fluorescent bulbs.

Pictures of the most commonly-used bulbs:

We use our own cookies and cookies from a third party to gather statistical information to improve our services and our website. If you continue with the navigation, you are accepting the installation and use of these cookies. You can change the configuration of your browser not to accept the installation or you can obtain more information in our Cookie Policy.

OK