Specialty and Architectural Lighting
Footlamberts for Projectors: What and Why?
Posted by George on for ProLampSales
A footlambert (or foot-lambert) is a unit of luminance. It is used primarily in the projection industry to provide a value for luminance of images on a projection screen. 1 footlambert (fL) is equal to 3.43 candela per square meter (cd/m2). When the footlambert value is known for a projection system (the projector and a screen), assumptions can be made about the clarity of images when viewed with varying ambient light levels in a room....
- Posted in Projection
Top Six Benefits and Uses for Red Light Headlamps
Posted by Nick on for ProLampSales
- Posted in Portable Lights
Laser vs. Lamp Projectors: What to Consider When Making a Purchase Decision
Posted by George on for ProLampSales
With an increase in the number of laser projectors on the market, everyone from industry professionals to armchair bloggers seem to be weighing in on the pros and cons of laser versus lamp digital projection. With 2019 here, it seems like a good time to compare the specs, review the arguments, and attempt to provide a basic decision guide for anyone buying a projector for commercial or institutional applications. Compare The Specs Light Source Rated...
- Posted in Projection
Ambient Light Reflective Screens Help Maintain Image Quality in Spaces with Extraneous Light
Posted by George on for ProLampSales
When buying a projector - whether for a classroom, conference room or sports bar - “brightness” will certainly be one of the specifications at the top of the list to consider. However, it's not only the projector that determines the perception of brightness for the viewer. While the lumen output of the projector is a key variable, the reflective properties of the screen have a significant bearing on how “bright” the images appear. In addition,...
- Posted in Projection
LED Direct Replacement: A Guide for 26W, 32W and 42W 4-Pin CFLs
Posted by Dave on for ProLampSales
Factors Affecting the Brightness of a Projected Image
Posted by George on for ProLampSales
Brightness sits at the top of the list when thinking about the quality of a projected image whether for conference rooms, classrooms, houses of worship or home theater applications. What are the factors that affect the brightness of a projected image? Projector Brightness When buying a digital projector one of the key metrics found on manufacturer specification sheets is brightness. Measured in lumens, this quantifies the light output of the projector. More lumens, more brightness...
- Posted in Projection
The Origins and Technology Behind Digital Projection Lamps
Posted by George on for ProLampSales
The UHP lamp (ultra high pressure lamp, usually mercury arc) refers to projector lamps with an internal pressure of over 3000 lbs per square inch. The acronym also stands for ultra high performance. Originally developed by Philips in 1995, it is a common light source for digital data front projection, video front projectors and rear projection televisions because it has very high light output available for the small environments of micro display projectors. The main...
- Posted in Projection
MR16 Luminous Intensity - How Does LED Compare to Halogen?
Posted by Dave on for ProLampSales
We've written here before about one of the toughest problems for manufacturers of LED replacement lamps: achieving light intensity comparable to halogen in the MR16 form factor - particularly for narrow beam distribution. The initial blog post was written in 2014, then updated in late 2016. The update concluded by stating that new breakthroughs in GaN on GaN technology had allowed the manufacturing of single point source LED MR16's – an important step toward replicating...
LED Lighting and Power Quality: The High Cost of Ignoring Power Quality Issues When Switching to LED
Posted by Dave on for ProLampSales
The effects of power quality on LED lighting performance generally receive little attention prior to installation for most commercial building applications. Power quality issues such as dips, harmonics, interruptions, transients and surges can result in expensive, early replacement of damaged or failed LED lighting equipment. While facility managers involved with smaller commercial projects may be able to ignore power quality without much consequence, larger industrial LED lighting projects, such as the replacement of existing HID...
- Posted in Energy Efficiency, HID & Metal Halide, LED, Retrofits
LED Troffers Offer Strong Case To Replace Fluorescent
Posted by Dave on for ProLampSales
- Posted in Energy Efficiency, Fluorescent, LED, Workplace