Lamp vs. laser: 3 things you should know
live-event 3 min Lektüre last updated on: Jul 09, 2021
In the early days, lamps were the traditional go-to light source in the projection world. However, fifteen years ago, the introduction of solid-state projection light sources like lasers shook the industry. And although both technologies have their own merits, changing the light source in a projector from lamps to laser diodes brings with it many advantages for the professional AV market. So it’s high time to jump aboard the laser train. Why? Here’s why.
- CAPEX vs. OPEX
The lifetime of a projection light source is the number of hours the projector can run at full power before the brightness of the light source, and consequently also the projection quality, drops to an unacceptable level for further use. (That is, not taking into consideration the other parts of the projector of course.)
For much of its history, the lifespan of lamp projectors could be expressed in hundreds of hours. Admittedly, by now lamp projectors have undergone several innovations to increase their lifetime, with recent claims between up to 6000 hours; but that’s still peanuts if you compare it to the typical 20.000 hours lifespan of laser projectors. If you do the calculation this means your laser projector can run continuous 24/7 for more than 2 years. And more practically, it translates to roughly 40 hours a week for an entire decade. Now that is a long time! And then we’re not even talking yet about ECO modes: if the environment allows for it, that is if it’s dark enough – you can lower the maximum output of your light source to extend its lifetime even more.
Laser light sources don’t just last longer, their performance is also more consistent over time. Where lamps will inevitably dim after a while, laser-based systems offer steadier brightness that decreases at a much slower pace. Idem ditto for color fidelity. Lasers guarantee a relatively constant and more stable color rendition over their lifespan.
Also, if a lamp explodes, your projection is done. If one of the laser diodes fail, which is highly unlikely, you still have the others which will form an image on the screen.
Let’s start this touchy subject by acknowledging the following: yes, the cost price of a laser projector is higher than the purchase price of a lamp projector. But you should think further than this initial investment. As you know by now, you will be able to enjoy the laser outcomes much longer. And don’t forget about the extra maintenance costs, higher electricity bills and other additional expenses related to lamp projection set-ups.
We’re not claiming laser projectors are maintenance free. Of course, you still need the occasional check-ups and upkeeps to clean fans, filters or lenses for maximum efficiency and performance. But the use of lasers does cut out the need for lamp replacements. Now, you might think the price of a replacement lamp isn’t the end of the world. Right. But take a laser projector with an operating lifespan of 25.000 hours, for instance, which will eliminate at least twelve lamp bulb changes. If you have an entire fleet of projectors, it quickly adds up to substantial savings in costs, and, equally as important, in time and labor.
Taking all this in consideration, there’s no denying that the total cost of ownership is much lower during the lifespan for a laser projector.
Coming back to that electricity bill, another important benefit of laser projectors is their power efficiency. Laser light engines create the exact colors that are needed with more focused energy and reduced heat dissipation. Needing less power for the same – or even a better and brighter – outcome, is great for your wallet, but also for your ecological footprint.
Defect laser engines are typically sent back to the factory for repair by a qualified technician. Lamp replacements can be done easily by the rental crew itself, but projector lamps can contain mercury or other hazardous waste materials which may cause serious environmental damage – and even health issues – if not dealt with properly. Burned-out lamps can’t just go in the trash but need to be disposed of by a specialized recycling center.
The advantages of laser projection are manifold. Lamp projectors are still OK for intermittent use in non-professional settings, but for high-demanding AV cases laser is the way to go. Choosing laser is improving your projection experience with quality, simplicity and reliability, while also significantly reducing your costs.
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