America’s Light Bulb Revolution | High Lumen Led Floodlight

Report Title: “Global Hazardous Location LED Lighting Market – Segmented by Type,by Class,Zones (Zone 0, Zone 20, Zone 1, Zone 21, Zone 2, Zone 22),End User Vertical (Oil and Gas, Power Generation,Petrochemical) Region – Growth, Trends and Forecasts (2018 – 2023)”

These bulbs were advertised with a 30,000 hour lifetime. I estimate the total use at 15,000-20,000 hours. During the 8 ½ years these were in service, one failed completely. Instead of replacing it with a newer bulb which would not match the color of the older ones (or replacing them all), I left that socket empty.

The new IndiviLED luminaire family by LEDVANCE shows how all these expectations can be met. The product family comprises pendant and ceiling luminaires as well as panel luminaires for standard grid ceilings. A special optical system consisting of many small “light squares” in which every individual LED has its own lens and a reflector to produce very high light quality. The result: glare-reduction that brings the unified glare rating (UGR) to under 16 as well as a very homogeneous light distribution. The many rectangular optical elements also create an appealing look and achieve a high level of efficiency of up to 120 lm/W.

Any discussion of light bulb lifetime would be incomplete without mention of the Phoebus cartel, an international organization formed in 1924 by the world’s leading light bulb manufacturers to manipulate the bulb market. As discussed by Markus Krajewski in “The Great Lightbulb Conspiracy”, the cartel assigned territories to member companies, limited production, and dictated a shortened 1,000 hour bulb life. Previous bulbs had burned for a much longer 1,500 – 2,500 hours. Purportedly imposed to increase quality, efficiency, and light output, the new 1,000 hour limit also resulted in many more bulb sales. Archived documents show that significant research was expended to devise bulbs that lasted their 1,000 appointed hours and no more. It wasn’t only household lighting that took a hit: flashlight bulbs originally lasting for three sets of batteries were reduced to two, with a proposal to limit their lifetime to a single set. Again, brightness increases were touted as the reason. However, that last step, halving bulb lifetime, would increase brightness only between 11%-16%, while doubling sales. This was about selling more bulbs and making more money.

Matthew Holmes hanged himself from a light fixture Feb. 14, roughly 12 hours after being transferred from mental health observation to segregation at Limestone Correctional Facility. Despite having twice attempted suicide in 2010, Holmes was not placed on suicide watch. Even though he had a serious mental illness, he was taken to segregation without an assessment. On the day he killed himself, Holmes responded to questions at a screening that he was depressed, had attempted suicide in the past and had recent, serious problems, yet he was still sent to segregation.

Funny how my directly heated triodes and rectifiers from the 1920s have filaments that continue to be reliable and light up today. Similar tech but different ‘needs’.

The LED panel tilts at three angles, which is useful if you need to look out into the distance or focus on what’s right in front of you or on obstacles at your feet. It has a splashproof, weather resistant rating of IPX4.

A solar motion sensor light is one of the most popular item that is going to be viral in coming years, due to its wide range of applicability in the industry. People may or may not be aware of the reason why people should buy a solar motion sensor light or why they need to have one.

Doesn’t the reduction in overall height sacrifice cabin space? The new Sylphy features an expressive, wide, low, stylish exterior design. It goes even further in terms of cabin roominess and comfort, which was already a key strength of past models. For example, knee space and head clearance are the same, or better, than in the previous Sylphy. Also, the car has a wide interior with excellent visibility for the driver and passengers. All riders are aided by the 'gliding wing' instrument panel design that makes the vehicle feel more spacious – a signature interior characteristic for Nissan.

This concept works well in homes as well as businesses. It is fun to have a grouping of lighting elements, hung at various heights over the kitchen island, the dining room table, above a staircase or in a tall entry way.

From the side, sleek forms combine with sensual lines to accentuate the car’s sportiness and clear coupe-like silhouette. Eye-catching sporty details include a trunk spoiler and black side skirts along the lower flanks. The car’s overall height has been lowered an inch to enhance the sporty profile even further. The new model is available with a choice of 16-, 17- or 18-inch alloy wheels, each with a design that suggests forward motion even when stationary. 

It gets complicated. I bought a fixture from Lowes which had a CC driver, but the LEDs were wired in series-parallel. That is, 3 in parallel, with 4 strings in series. So if one LED opens up, the other 2 bear the current, which hastens their demise. If one shorts, no problem, the light is just reduced. But I haven’t seen any that short out unless they were overvolted, highly unlikely in a CC fed string.