In this article, we are mainly talking about the comparison of LED high bay light versus HID light source.C omparing the Advantages, Disadvantages and Differences of LED VS HID. The HID vs. LED battle heats up as recent improvements and lower prices make LED lights a more viable option.
- LED VS HID: Better Light Source
HID, short for high-intensity discharge, which was invented in 1675 by Jean Picard. The first xenon short arc lamps were sold in 1951 by the German company Osram. They were primarily used for movie projection.
There is no doubt that LED light plays more and more important role in light industry either in developed countries or developing countries.
As for LED high bay lighting, the current and future demand in the new commercial building market (Retrofit market) has been grown rapidly during past years.
LED high-bays are equally well suited for both new construction and retrofit applications. However, the reality of the current market is that there are simply many more retrofit project opportunities available. One-for-one retrofits are driving most of the market and this will likely continue for the foreseeable future.
Market share of LED high bay lighting, we estimate that LED high-bay lighting account for over half the sales in this category in 2015(against HID and fluorescent in the new construction high-bay lighting market). It is growing rapidly at more than 25 percent per year. At that rate it won’t be long before LED captures dominant share both in terms of unit and dollar sales.
2. LED VS HID: Light Efficient Comparison
- HID lamp: Source efficiency is typically 120 lumens/watt or higher. However, as mentioned above, losses from trapped light, protective covers and lenses, inefficient ballasts and unfavorable operating temperature typically result in a measured system efficiency of 30 lumens per watt or less.
- LEDs: LED high bay light developed by Gorgeous Group has the light efficiency up to 150 lumens per watt or higher, which is the luminaire light efficient, the light efficient for LEDs will be even higher. As for other companies, LED high bay light can have 80~120 lumens per watt depending on the type and manufacturer of the LED used.
The only loss for LEDs is caused by the optic lens, due to the LED high bay light normally require waterproof IP65 degree, and the optic lens can work as protective cover as well.
Many traditional light sources become less effective as operating temperatures change.
However, LED light keeps the same bright after the first 30mins.
3. LED VS HID: Reduced Heat Output
HID lights conduct lots of heat during working, while LEDs have a much lower heat output than other light bulbs. This can be particularly helpful for refrigerated warehouses, where the heat given off by older bulbs makes it difficult to maintain optimum refrigeration temperatures and leads to higher energy costs.
4. LED VS HID: Longer Life Working & Reduced Maintenance
The 35,000 to 50,000 hour bulb life of LED, such a dramatic difference when compared with 1000 hour incandescent or 2000 hour halogen, is less dramatic with metal halide. Typically, the type of metal halide light bulb used in high bay applications has a rated life of around 20,000 hours. While LED replacements available today double that expected life, the benefit must be weighed against the additional initial cost of LED high wattage bulbs compared to metal halide.
In addition, a key factor in determining if the added LED bulb life makes a retrofit cost effective is the cost of labor to replace the lamps after the initial installation. Metal halide bulb replacement will require twice the labor compared to LED. Does this savings exceed the bulb cost differential?
Of course there are other factors than lamp life to consider. Energy savings could be significant. A 400 watt metal halide bulb can be replaced with a 180 watt LED. Implementing an LED replacement program should result in a 55% reduction in annual energy use (kWh) costs. It may also lower electric demand (kW) charges. The impact of this savings depends on the number of lamps being replaced, the time of operation and the electric rates.
LED technology has other potential benefits than long life and lower energy use. It also overcomes specific drawbacks of metal halide.
In comparison to metal halide, LED has 2.5 times longer life, much higher lumen maintenance and instant start capability, which of course comes into play when using them with controls.
5. LED VS HID: Dimming and lighting controls
LEDs also lend themselves easily to dimming and other lighting controls. They turn on and off immediately, whereas HIDs take much longer to reach full brightness. They can be connected to occupancy and other lighting sensors so that intermittently used spaces are not lit when they aren’t being used. LEDs work well with dimming controls, allowing you to add control to lighting environments and tailor lighting levels.
0-10V dimming has become a standard, and on/off or high/low sensors are a popular option. Based on mean lumens, fixture efficacy can be more than double when comparing to older probe start technology or 40 percent higher when comparing to the most efficient generation of electronically ballasted Pulse Start metal halide lamps. These savings can be substantially higher if lighting controls such as occupancy sensors and daylight harvesting are used, which were not practical to apply with most HID systems.