Foot Lambert



foot-lambert.gif

Foot-Lambert is a measure of luminance, primarily in the US. The metric (SI) equivalent is candela per square meter (nits).

Foot-Lamberts, or ft-L, are measured with a luminance meter, either off a reflective surface such as a screen, or directly off a TV/display. In the US, movie theater screens are designed to ideally have 16 foot-Lamberts "open gate," or when the projector is on but there is no film. This is significantly lower with 3D. In the home, on a 100-inch screen, most projectors can do this amount or more. LCD and plasma televisions can do much, much more than this, with some LED models capable of 80 foot-Lamberts and higher.

A foot-Lambert equals 1 / �? candela per square foot, or 3.4262591 candelas per square meter (nits).

The foot-Lambert is named after the Swiss scientist and mathematician Johann Heinrich Lambert, who's stylish mug you see here.

Foot-Lamberts should not be confused with lumens, which are an illuminance measurement, and are not convertible to ft-L (or vice versa).


Newest

May 29
Frontier/Arris IPC1100 FIOS DVR Reviewed Since its introduction in 1997, I have been a loyal DirecTV subscriber. Despite a number of moves around Los Angeles,...
Frontier/Arris IPC1100 FIOS DVR Reviewed

May 27
SVS SB-3000 Subwoofer Reviewed Greg Handy gives SVS's new mid-priced, mid-sized sealed subwoofer a spin.
SVS SB-3000 Subwoofer Reviewed

May 27
Goodbye to My Oppo UHD Disc Player, Hello to a Whole New System Jerry bids a fond adieu to his beloved UHD Blu-ray player, as he looks toward more exciting frontiers in the world of high-performance AV.
Goodbye to My Oppo UHD Disc Player, Hello to a Whole New System

May 24
New Lutron Smart Bulb Dimmer Keeps Philips Hue Lights at the Ready We here at HomeTheaterReview consider lighting control to be an essential element of any good home entertainment system. There's nothing...
New Lutron Smart Bulb Dimmer Keeps Philips Hue Lights at the Ready

May 23
Control4 Releases Massive New OS 3 Update The fresh new operating system adds native MQA decoding, a new way of interacting with distributed audio and video, and a sexy new look that can be customized and personalized like never before.
Control4 Releases Massive New OS 3 Update