Kelvins and Lumens: The Two Numbers Buyers Get Wrong
Colour temperature and light output are the two specifications that decide whether a lamp is accepted on site, and they are routinely confused with each other and with watts.
Why this keeps coming up
Consumer research reported in the trade press found that buyers are interested in LED lamps and many already own them, while still not being clear on what kelvins and lumens represent. Younger buyers aged 18 to 39, and buyers with higher income and education, show more interest in smart lighting and more awareness of lighting's impact.
Lumens are the light, watts are the cost
Luminous flux in lumens is what the lamp produces. Watts are what it consumes. Every reference in this catalogue lists both, which is the only way to compare two lamps honestly.
Kelvins are the colour, not the brightness
Colour temperature in kelvins describes whether the white is warm or cool. The tunable products in this catalogue move across a range - the Bluetooth bulbs between 2700 and 6500K, the Wi-Fi downlights across the range quoted per reference.
What to fix in writing before you order
Fix the lumen figure, the colour temperature and the CRI in the order, not in conversation. Colour rendering matters wherever product or skin is being looked at; several references in this catalogue quote Ra above 82.
Also In The Knowledge Centre
360 Degree LED Bulbs: What Changed When the Beam Went All the Way Round
Why the 360 degree LED bulb family was launched, what power and base options it covers, and where it genuinely replaces an incandescent lamp.
Read →Technical NoteInside the Wi-Fi Downlight Platform: 2.4GHz, 1 to 100 Percent, 20 to 30 Metres
The documented specification of the Wi-Fi controlled downlight family, and what those numbers mean for a real building.
Read →Technical NoteWhen the Client Will Not Share the Wi-Fi: Bluetooth Lighting
Bluetooth 4.0 bulbs pair straight to a phone, which solves the hotel, rental and small-office case where no one is giving out the router password.
Read →Questions On This Note
What CRI should I ask for?
Order The Products Behind This Note
Quote the reference names with your quantities and destination port, and the price comes back with packing detail.