Skip to main content

    Blog Series: Tech Talk

    Tech Talk: How to keep up to date in a tech-savvy world

    Written by Mike Graham, product manager for CHAUVET Professional

    Mike Graham looking pensive in front of MVP video panels

    I had a meeting with an optics supplier today who was telling me he used to sell computer servers. He pointed out to me that he thought his old industry moved fast. When he got into the optics industry, and more specifically into LED optics, he really found out what fast was. The point? We all know when you buy a computer, it is already out of style and there is a newer, faster one out there. In the LED world, it is no different. It is hard to imagine, but we all know that the PAR can, beam projector, and ellipsoidal fixtures have continued to be produced with very little change over the past decades (with just a few exceptions).

    LED fixtures have changed drastically in a very short time, going from the tiny 5mm diodes to the high-powered LEDs we typically see today. While this is a good thing and keeps us all on our toes, we all must do our homework every day.

    CHAUVET launched the MiN Spot in 2007 and revolutionized the industry. Yes, it was a club light and not designed for touring, but it paved the road for things to come (such as our road-ready, LED-fitted COLORado series). Now we have the Q-Series, which has gone from an all-discharge series to an all-LED series in just under two years and continues to grow.

    We must keep up to date on new technology. For manufacturers, it is to stay ahead of development trends. For retail markets, it is to make sure they have the latest, newest gear. For rental houses, it must offer its clients the latest, newest gear with an eye on maintaining their return on investment. And for light users, make sure you have www.chauvetlighting.com set as your browser’s home page.
    Good luck, be safe and send us pictures from the road!

    Tech Talk: Four Ways to Keep Mud off Your Lights

    Written by Mike Graham, product manager for CHAUVET Professional

    Mike Graham looking pensive in front of MVP video panels

    Spring is in the air. Warm air is finally returning to the northlands and people are ready to start partying outside. Ah yes, outdoor festival season is upon us with all its glory. Mud, mud, and more mud. Cables running through mud, generators running “around” the kind of power you need, midday rain storms, wind, and my personal favorite, people throwing mud balls onstage. What are we to do to survive these rites of passage into summer? Here are four easy tips:

    1. Bag it! When you are hanging moving lights in areas that are prone to getting soaked by a passing shower, put a plastic bag over it. Pull the bags off before the show opens and you are good to go. While the show is running, as long as the lights are on, keep them on unless you are in the middle of a driving thunderstorm. In that case shut down and head for the bus.

    2. Shield it! If at all possible, shield the ground row. Keep the mud off of your strip lights. If you are using COLORado IP fixtures you are good to go. Just hose them off for the next show. If you are using COLORado Tour products, make sure that the powerCon connectors are covered if you are not using them. Also make sure that the DMX connectors are covered as well. If you are using the COLORado Batten 72 TOUR, make sure that the airflow to the fan is not obstructed.

    3. Meter it! Make sure the generator is actually working at the voltage you want it under the load you intend to use on your show. DO NOT USE home generators for powering your show. Those are fine for keeping your fridge and a few lights going at the house during a storm, but are not meant for running entertainment lighting.

    4. Check it! As in the weather before you load in. Every year we hear about someone who has set up their roof system only to have it blown down or hit by lightning. While sometimes this is completely unavoidable, the dangers can be kept to a minimum. Take every safety precaution before doing the load in. Keep an eye on the weather reports. There are a ton of websites and applications that can warn you of impending thunderstorms. If you see the sky clouding over and hear the thunder rolling in the distance, time to get off the rig.

    After your show is over and you are packing the truck, try to leave as much of the festival at the festival you can. It’s always a good idea to make sure to pack a bunch of towels so you can wipe down your cables and lights. This will save time at the shop and keep your truck cleaner. If your movers or other electronics did get soaked, make sure to get them dried out as quickly as possible. Nothing worse than putting an expensive wet moving head into a road case, storing it in the back of a hot truck, then opening it up a few days later and smelling the mold grow. Good luck, be safe and send us pictures from the road!

    Tech Talk: How to Master the Art of Busking

    Written by Mike Graham, product manager for CHAUVET Professional

    Mike Graham looking pensive in front of MVP video panels

    We all prefer to walk into a show that is totally programmed and ready to rock. We love it when there is actually time to program a show during the rehearsal stage of the production and have a clear and concise cue list. It’s even better when there is someone there to actually tell us when to press “go.” Personally, I put the chances of having all of the above on the same level as seeing Elvis do a tour again. In today’s world of budget cuts and lack of rehearsal time, we find ourselves having to make things up as we go—also known as “busking.” If you are new to busking, here are some tips to help you be in control while everyone else around is losing it.

    1. Know your controller! This is the most important tool you have. If you are using a fader board and a bunch of par cans, you don’t have a problem—just know your patch and how to get around quickly. If possible, keep a “punt look” on a cue button. The “punt look” is a go-to look you can use in case of emergency. If you are using a larger format console, I always have a library of preset looks I can drop to at a moment’s notice. This consists of a few solid colors and a few complementary colors for the static wash lights, as well as a few effect looks for the moving lights to work from. Still, I have a “punt look” that keeps the stage lit between songs. You need to know how to get to your looks easily and quickly so you don’t look bad. The way you set up your controller will make or break your show. You don’t want to accidentally hit the high-speed ballyhoo and strobes during the juggling session. It will be funny for you, but not so much for the juggler or the people in the first, third or fourth rows.

    2. Know your rig. You need to be totally aware of the functionality of the lights you are using. If you are using a Legend 300E Spot, you need to know the CTC is on the color wheel and not in the CMY. You also need to know if you are using COLORado 1 TOUR and COLORado 1 IP units together; one of them has white LEDs and the other does not. Most importantly, you need to know where they are patched on the console. Refer to tip one.

    3. Know the expectations. Ask the person(s) “in charge” of the show what they expect to see. If it’s a concert, they will hopefully have a playlist of songs. If it’s some other kind of event, you may not even have this to work with. Try to get a feel for the show or event to predict what your audience wants to see. When you are setting up your libraries in the console, it’s critical to have all of the information from the client so you can match the looks you build with the client’s vision.

    4. Remain flexible. Know your equipment and relax. You can’t busk a show if you are tense. As long as you have taken the time to research what each one of your looks does, you will be able to feel out what you are going to use and at what time. If you are doing a wedding for example, you know that at some point they will do the “Chicken Dance.” If you know this, have a look for it prepared. If you are doing a cover band, you know at some point they are going to attempt “The Final Countdown,” so have some looks for that. The key is to try to anticipate what is going to happen next and to flow with it. Again, refer to tip one.

    5. Don’t panic if you make a mistake. Remember that “punt look” button? It’s there to save you when you make a mistake. This look should not have anything moving and should be as neutral as possible. It is your total get-out-of-jail-free card. (Check out tip one for a refresher on why console layout is important.) If it makes it easier, put some glow tape on that button key so you know where it is. The most important thing is to make sure the stage won’t go black. A black stage is a fairly obvious sign you just blew it.

    6. Prepare to multitask. For those of you who are busking and calling spotlights at the same time, first lay off the caffeine early in the day–you are going to be stressed out enough. Second, prior to your show let it be understood that in the event of a communication breakdown, you are going to spot the person talking or singing into the microphone. In the absence of that, hit the guy doing the solo. Never spot the drummer. Never spot the juggler while juggling. It may be funny for you, but it won’t be for the juggler.

    7. Be part of the feel. Every event has its own feel to it. Don’t walk in blind. Have as much information as possible before sitting down behind the controller to start setting up your looks. Know the target audience. Chances are you will be sitting in the middle of them and you can gauge what the general speed of the show will be. If you look out and see a lot of freaky tattoos and pierced faces, then any kind of moving light show will do as long as it’s fast and bright. If you look out and see room full of walkers and blue hair, you know that you will need to keep the lights on the stage.

    Even when we make it up as we go, we should still use some guidelines. You may not have an exact plan as to what the show is going to look like, but at the very least, with the tips above, you can feel comfortable managing the outcome. The overall key is to stay relaxed and not to panic. Practice busking as often as you can. It is a skill we all need to keep honed to a fine point and practicing it will give you nerves of steel.

    Tech Talk: Quick Guide to Proper Light Maintenance

    Mike Graham pensive in front of MVP video panels.

    Written by Mike Graham, product manager for CHAUVET Professional

    The key to maintaining long-lasting lights is keeping them clean and properly lamped if they are not LED fixtures. It’s important to keep all of your lenses, gobos, and reflectors as clean as possible.

    1. How to clean: Use something with a high alcohol or high vinegar content, as both tend to evaporate quickly. If you have a layer of grime on your lenses from pyrotechnics, dust or oil based fog fluid, spray some WD-40 into a small bowl and add a little rubbing alcohol to it. Mix it up and wipe down the lenses with this. The WD-40 will lift up the dirt and the alcohol will help it to evaporate. Then go back over them with a glass cleaner.

    2. What not to use when cleaning: Never spray glass cleaner into the light. This can damage sensors. Also, never use de-greaser. It leaves a film that will bake on to the glass as soon as it heats up. Do not use old rags as they may have solvents on them from a previous use. Clean cotton cloths are the best. Cloth diapers work well and are inexpensive.

    3. How often should you clean? Clean out your lights every time you re-lamp. LEDs should be cleaned every three months depending on the environment in which they are used.

    Tech Talk: How to Choose the Right Lamp

    Written by Mike Graham, product manager for CHAUVET Professional

    Mike Graham pensive in front of MVP video panels.

    Most lighting manufacturers suggest using their recommended replacement lamps. A cheaper replacement might be tempting, but you may not be pleased with the results. A lot of research and development goes into producing a professional fixture long before it comes to you. Time is spent deciding on the colors, gobos, DMX layouts, among other crucial choices that determine a luminaire’s features and benefits.

    1. It’s all about the lamp. One of the most important decisions manufacturers take is choosing the lamp the fixture will be designed around. Manufacturers pick colors based on the lamp’s color temperature in order to get the best color saturation. Discharge lamps usually burn between 5,600K and 7,000K depending on the brand and the wattage of the lamp. If, for instance, the color red is selected and is not saturated enough, it will appear pink. This goes for CMY color mixing as well. Too saturated – you’ve got the wrong color; not saturated enough – still the wrong color.

    2. What if you use another manufacturer’s lamp? A lamp of a different brand should work just fine. Everything remains the same: the wattage, the temperature of the burn, the bulb size and the pins are the same. However, the lamps of a different brand have slight variations in the sizes of their bulbs – slightly larger or smaller – that can negatively affect the output colors or even cause the lamp base to break.

    Check out the photo at left to see why lamp choice is so important. These two lamps are double-ended 575W and are supposed to be interchangeable. However, since the bulb is different, it may cause damage to the light base or change the output.

    As a rule of thumb, it is best to always use the lamp that the manufacturer recommends, knowing know you are going to get the optimal performance out of your investment.

    Tech Talk: Learn How to Measure the Lux

    Mike Graham pensive in front of MVP video panels.

    Written by Mike Graham, product manager for CHAUVET Professional

    LED technology brought many advancements to the lighting world. The ability to use 30 COLORado 1 units off of one 20Amp circuit is amazing and was unheard of until a few short years ago. Who would have thought that we could stop changing lamps and cutting gel for PAR cans? LED technology has left us with a few problems though, one of which is measuring the brightness of its light products.

    1. Did you know? While lux and lumen readings depend on seeing a full spectrum of visible light, LED fixtures do not produce the full spectrum. They only produce spikes of color. Those spikes reside in the red, green and blue zones of the color spectrum. This causes light meters to give inaccurate readings due to the missing information.

    2. Know how to read the lux. When comparing the lux of a PAR 56 MFL and a COLORado 1, for example, the problem becomes apparent. At full white, the PAR 56 is 17,800 lux at 1m, while the COLORado 1 with a 15-degree lens is 11,862 lux. The difference can be attributed to the missing portions of the spectrum. When you look at individual color, the truth comes out. In red, for example, the COLORado 1 is 4,045 lux. The PAR 56 is 2,560 lux. Now we can start to see the misleading lux readings. The LED fixture is going to be brighter in the red, green and blue because those are native colors to the light. The PAR 56 must have a gel added to create these colors.

    3. Conclusion. The moral of the story is to be careful when looking at the lux readings of LED fixtures. Lux readings are not the whole story and most likely were taken when the fixture had all of the LEDs on. When you have clients who demand the old PAR can because the lux is higher, let them know that it’s not all about the lux – their eyes should be the judge.

    Tech Talk: How White Is Your White?

    Mike Graham pensive in front of MVP video panels.

    Written by Mike Graham, product manager for CHAUVET Professional

    Color temperature has become a benchmark that is used to determine how bright a lamp source appears to the naked eye. In architectural lighting, the color temperature tells the lighting designer which white is right for a given application.

    This is a diagram from inside the chromaticity space. It shows the range of color temperature inside the range of white. The measurable range of white is between 1,500K and 10,000K.

    How do we measure color temperature? Color temperature is measured on the Kelvin scale (K). The Kelvin temperature number is determined by comparing the light source’s chromaticity with that of an ideal blackbody radiator. The temperature at which the heated blackbody radiator matches the color of the light source is the color temperature for that source.

    Different applications call for different color temperatures.
    •    In architectural lighting the typical range of color temperature is between 2,800K and 5,000K. These are the levels of white with which people are used to working and living.

    •    In theater, a typical stage is lit between 3,200K and 3,400K. Theatrical paints and costumes are created with this range of color temperature in mind.

    •    For the big shows. The advent of discharge lamp sources upped color temperatures to the 5,600K to 8,500K range depending on the lamp that is being used. These higher color temperatures help us create the huge light shows and make the bright looks that cut through all of the other action in a rock show.

    So, when you are working on an installation, production, corporate event, or any other kind of lighting job and the client asks for white, you are totally justified in asking, “What color temperature?”

    Tech Talk: AMX to MPX and DMX

    Written by Mike Graham, product manager for CHAUVET Professional

    Mike Graham pensive in front of MVP video panels.

    1. What is AMX? More commonly known as Multiplex or Analog Multiplex, AMX 192 was devised to multiplex up to 192 analog dimmer levels down a four-wire cable. There are thousands of installations that still utilize AMX protocol because the dimming systems they were plugged into were built like Mack Trucks and endured.

    2. The transition to DMX. Boxes to convert DMX into AMX were developed in order to avoid problems with the control. As technology began to become less expensive and started to filter into the lighting world, a new protocol was needed to handle larger dimming racks and moving lights. DMX-512 superseded AMX 192, but it came with its own sets of headaches. No standard existed in how DMX protocol was delivered to fixtures. Each manufacturer had its own method. This left smaller companies that made basic dimming and control in the lurch.

    3. What is MPX and why use it? Several manufacturers began to use a system called Multiplex – a touch of both DMX and AMX. Others used their versions as MPX. So here we are with all of these smaller controllers out there with Multiplex outputs sometimes sitting right along a DMX-512 output.

    When trying to answer some overwhelming questions such as, “What port do I plug into?”, or “How do I keep from ruining a fixture because multiplex puts current down the line?” follow this simple rule of thumb: if you are using like control with like dimmers, Multiplex is the way to go. If Multiplex is all your controller puts out and you want to control intelligent lights, you need to get a new controller.