One of the primary questions that arise in the mind of projector buyers is that out of a lamp, laser, and LED, which projection light source is right for their use. Each of these lighting technologies has its strengths and weaknesses. The image quality and color reproduction capability of a projector will depend on its light source.
A few years ago, the obvious choice for most users was a lamp projector, as LED projectors were not bright enough and laser devices were out of the budget of nearly all buyers. However, as the prices of LED and laser projection light sources have declined and their image quality improved, the number of options available for shoppers has increased. The plethora of choices on the market has made the buying decision harder. Basic knowledge of the technologies and their strengths and weaknesses can assist buyers in choosing one over the others.
Lamps as Projection Light Sources
A majority of projectors in the past have used a lamp as a light source. They are known for their high brightness and the preferred option for environments with high ambient light, such as conference rooms and auditoriums. The brightness rating of lamps is significantly higher as compared to LEDs. However, with the introduction of laser technology, projectors with laser light engines have matched and surpassed the brightness rating of lamp projectors. Models that use a lamp as the light source are also the cheapest in their class. But when considering the cost of ownership, they may not be an economical option, especially for viewers who use their devices for long hours. A lamp projector may be a couple of hundred bucks cheaper as compared to an LED projector. But if individuals have to replace the lamp thrice in five years and spend an additional three hundred bucks, then they will find the LED projector cheaper in the long run.
The major disadvantages of projector lamps are their short life and fast degradation rate. Their lifespan ranges from 3,000 to 8,000 hours on average, although some bulbs are rated for 15,000 to 20,000 hours in ECO mode. However, the brightness output and power usage decrease as well in this mode, lowering overall image quality. The percentage of drop in brightness of a lamp over its life is also higher, with the number being in double digits after the first few hundred hours. They can lose 25% brightness in under 1,000 hours, which is quite a lot as the end of life is considered at 50% for a projector lamp.
Despite their weaknesses, devices with a lamp projection light source have a place in the market. Buyers who want a cheap projector with high brightness levels and will use it for a few hours in a week can consider lamp projectors. Professional settings such as businesses and educational institutions where ambient light can’t be controlled will benefit from devices that use a lamp as their projection light source.
LEDs as Projection Light Sources
LED light sources are known for their small size, low power consumption, and long-lasting nature. They are common in compact and portable projectors in addition to standard home and office projectors. LEDs are typically rated for 20,000 hours in the standard viewing mode with full power. The lifespan will easily surpass 30,000 hours in ECO mode. Users will have to replace them less frequently as compared to lamps. Actually, in most cases, an LED projector will become obsolete before its light source requires replacement. Their high initial cost is offset by the low cost of ownership, making them an excellent option for users who will use the projector for several hours every week.
The biggest downside of LED projectors is their limited brightness rating. The maximum brightness of models employing an LED projection light source will be under 1,800 ANSI lumens, with a majority of them lying in the 700 to 1,200 range. Pocket-sized projectors may have a brightness rating under 100 ANSI lumens. In the past couple of years, projectors that utilize an LED projection light source have been released with a brightness rating of 2,500 to 3,500 ANSI lumens. They utilize HLD (High Lumen Density) LEDs capable of producing brighter images as compared to the traditional LED projectors. However, their price markup is significant as well.
At the same time, as the LEDs are pushed to the limit for maximizing brightness, it can result in oversaturation of colors in the imagery produced. It won’t be an issue in the professional domain, such as offices and classrooms, but it may be problematic for watching movies at home or viewing graphics and photos in a workspace because of non-realistic color reproduction. Projectors that use an LED projection light source may be unsuitable for areas where ambient light can’t be controlled. They are best for environments with low levels of ambient light.
Lasers as Projection Light Sources
Lasers are the latest revolution when it comes to projection light sources used in projectors. They are better in numerous aspects than both lamps and LEDs. The brightness rating of projectors with a laser light source can be anywhere from 1,000 to 4,000 ANSI lumens, sometimes significantly exceeding the same. Many laser projectors have a higher brightness rating as compared to lamp ones. Industrial models used in open-air venues with a laser projection light source can have a brightness rating as high as 30,000 to 50,000 ANSI lumens.
Their color and contrast reproduction can match and even surpass lamp-based projectors. Models with a high brightness rating can still maintain good color accuracy, which is a characteristic that lamp and LED projection light sources lack. It makes them suitable for presenting graphics like at museum exhibitions that require realistic color reproduction as well as for home theaters. A major advantage of laser projectors is that they are suitable for continuous operation and can be run 24×7 throughout the year. The DLP and 3LCD models require very little maintenance. Most laser light engines have a life expectancy of 20,000 to 30,000 hours, making them great for high-usage scenarios.
The significant downside of laser projectors is that they are expensive than devices using a lamp or LED projection light source. A good quality model can cost around $3,000 to $4,000, with many premium models priced above $10,000. There are cheaper projectors that use a laser projection light source, but their image quality may be inferior to similarly priced lamp and LED models. The cost of industrial laser projectors can easily run into six figures.
Projectors with a laser projection light source are ideal for applications wherein the device will be used continuously for long hours. These may include large-scale places of worship like churches and temples, outdoor venues like open-air concerts, auditoriums, and theaters.
Lamp, Laser, or LED: Which Projection Light Source Is Right?
All types of projection light sources used in a projector, namely lamp, LED, and laser, have a place in the market. It is about which of these light sources suits the usage requirements of the viewer. Lamp-based projectors are super affordable and ideal for budget-constrained buyers. Their high brightness rating is apt for almost all ambient environments, especially where light can’t be controlled in the room or hall. The relatively short lifespan of lamp projection light sources makes these projectors befitting for a few hours of viewing per week.
Devices with an LED or a laser projection light source are best for demanding use cases. The long life of their light engines makes them a worthy option for several hours of viewing per week. The choice between LED and laser projectors will be based on the budget and quality expectations of the buyers. LED projectors are cheaper than laser models but have a lower brightness rating and may yield inaccurate colors. For large-scale establishments like cinemas and open-air venues such as concerts, laser projectors are the obvious choice. At an individual level, buyers who want the best viewing experience without budget constraints may consider a projector that utilizes a laser projection light source for their home theaters. Users looking for affordable options for several hours of weekly viewing may consider LED projectors.