How-To / Buying Guides
LED Bulb Wattage Guide: 5W, 7W, 9W, 12W, 15W or 20W — Which Do You Need?
A practical, lumen-first method for choosing an LED bulb wattage for different rooms and tasks.
Helfinch Technical Lighting Team
The Helfinch Technical Lighting Team publishes practical, evidence-led guidance on LED selection, lighting product and manufacturing context, photometric terminology, energy efficiency and lighting applications. The team works within Helfinch and does not claim individual engineer credentials.