Hi, we are building a welding laboratory at the Tecnological in Rafael Landivar University in Guatemala, we are trying to be a low consuption area in lighting to be a role model at the campus. I am not sure if Led lighting can be a solution (cost effective) and if you know another similar projects?
Many thanks for your question and great to read you are developing a role model on the Guatemala campus!
Indeed LED would deliver one of the most energy efficient solutions. The investment will be higher than conventional lighting, but keep in mind that over the course of the installation's lifetime, the investment cost for hardware is only roughly 15% of the total cost.
To find out how much money you can save using energy efficient lighting and how your installation performs environment-wise compared to conventional lighting, take a look here: http://applications.nam.lighting.philips.com/ecocalculator/ . Please pick any of the proposed solutions and then click on the green button in the end to do a detailed calculation based on the number of lamps etc that you need.
One issue in workshops is the flickering of fluorescent tube lights that - just like a stroboscope - can make running machines appear as not running etc... However with the current high frequency technology this is not an issue anymore and you can safely install such fluorescent lights which is a viable and responsible alternative.
If there are recommendations or rules for illuminance and luminance of workshops in your country, feel free to share over here and we can support you better.