First in LED Surgical Headlight Innovation and Service

| Frequently Asked Questions |

You’ve got questions about LED surgical headlights. We’ve got answers.

LED Lighting

What are the key reasons surgeons purchase Enova Illumination LED headlights?

Our customers repeatedly tell us how important the following features are in tipping the scales in favor of an Enova LED surgical headlight.

Superior Illumination. Enova LED surgical headlights illuminate the entire surgical field with pure white light from LED chips that lasts 50,000 hours. In fact, the Cyclops XLT-225 is the brightest LED surgical headlight on the market. And, the color temperature of all Enova headlights is 6100° Kelvin. By providing consistently bright light and no light degradation Enova LED surgical headlights decrease eye fatigue.

Long Battery Life. No other LED surgical headlight provides battery power that lasts as long as Enova’s PP4 Battery Pack. When used with the Cyclops XLT-125, this four-cell battery will keep the LED illuminated for up to 8 hours at maximum intensity and 24 hours at minimum intensity.

Lightweight yet durable. Enova Illumination has designed its headlights to be ergonomically balanced and lightweight. Weighing no more than 11 ounces/312gm, our headlights are durable. The lamp is constructed of aluminum instead of plastic and the headband is constructed of rigid plastic and double-padded neoprene comfort pad. Having such a lightweight headlight helps reduce headlight headache.

Other reasons that are brought up to us when customers talk about Enova Illumination headlights include untethered freedom, easy maintenance, low overall costs, the five-year warranty on the headlight and our outstanding customer service.

What are LEDs?

LEDs are solid-state semiconductors that release electrical energy in the form of light. They do no break or burn out. The LEDs used in Enova Illumination headlights last approximately 50,000 hours—that’s 25 years of illumination if the headlight is used 8 hours a day. Wow.


What is the difference between halogen, xenon and LED technology?

LEDs are light emitting diodes, solid-state chips releasing energy in the form of photons, or light. Illumination from LED chips will not degrade with time and will last upwards of 50,000 hours. The light emitted from Enova LEDs is pure white, bright, cool light and the system is digital–it is either 100% on or off. Halogen and xenon degrade in luminosity over time due to bulb degradation and fiber optic cable breakage. All fiber optic xenon and halogen system emit infrared heat.

Will LED illumination degrade in quality like xenon and halogen illumination?

No, LED illumination will not degrade with time. Light quality and intensity will remain constant without any degradation. The light emitted from Enova LEDs is pure white, bright, cool light and the system is digital–it is either 100% on or off.


What are long-term cost benefits of LED headlights over traditional bulb technology?

Compared to purchasing a 300-watt xenon fiber optic system and factoring in the approximately $1,000 annual costs for bulb and cable replacement costs, LED surgical headlights saving can be conservatively estimated at approximately $3,000 to $5,000 in the first year.

How is brightness measured?

Brightness can be measured in Lumen, Lux, and foot candle.

Lumen is the unit of total light output from a light source. It indicates the rate of energy low and a power unit like the watt or horsepower.

Lux is a measure of brightness in which one lux is equivalent to one lumen per square meter; 50,000 lux is equivalent to 50,000 lumens per square meter, and so on. Average indoor light ranges from 100 to 1,000 lux; average outdoor sunlight is about 50,000 lux.

Foot candle is an older measurement of brightness in which one foot candle is equivalent to one lumen per square foot.


Is brightness adjustable?

Yes. Light intensity is adjustable from full intensity (100%) to reduced intensity (30%)


Is aperture adjustable?

Yes, aperture is measured at 14" (36 cm).

Our Cyclops XLT-225 has 225,000 lux, a field of illumination ranging from 2" to 5" (5 to 13 cm).
Our Cyclops XLT-125 has 125,000 lux and a field of illumination ranging from 2" to 5" (5 to 13 cm) 


What is the color temperature of illumination?

6100 degrees Kelvin – pure white illumination (comparable to daylight on a cloudy day) that provides true tissue color rendition.

Why is headlight field of illumination "diamond" shaped for some models?

Enova Iris models feature “reverse-mounted reflective” technology where maximum brightness is achieved by mounting the LED chip on the lens “cross-hair” facing backwards, so its light is reflected and columnated forward.  You are seeing the reflection of the square LED chip. Most surgeons find the shape of illumination is not obvious in the uneven topography of the surgical field.

Enova Cyclops models feature “refractive” technology with round field of illumination

Can Enova surgical headlights be used with loupes?

Yes. Enova headlights can be used with loupes mounted on eye-glass frames and support magnifications up to 4.5 times. The Cyclops XLT-225 and XLT-125 feature extra long lamp adjustment brackets allowing for coaxial alignment with loupes. Illumination is on the same plane as your vision.

How is a headlight sterilized?

Surgical headlights should be wiped down with 70% isopropyl alcohol or similar disinfectant after each use.


The metal housing on my Enova headlight gets warm. Is something wrong?

No. The metal housing used on Enova headlights is a heat sink designed to remove heat from the LEDs for greater light output. After several minutes of use, the metal housing will be  warm (up to 120º F; 48º C) but not hot enough to cause injury.

How are joy sticks (model D-200 only) and lamp protectors used?

Joy sticks are autoclavable and are screwed into each side of Enova’s Iris D-200 headlight. Lamp protectors are silicone rings that are autoclavable and slipped over the lamp housing of our Iris model headlights. Joy sticks and lamp protectors allow surgeons to adjust the headlight while remaining sterile.

Are Enova headband pads replaceable?

Yes. Enova Comfort Pads (#80400-001) are attached with Velcro and are replaceable. It is recommended that they be replaced every three to six months.

Where are Enova headlight systems manufactured?

Enova surgical headlights are manufactured in St. Paul, Minnesota in the United States.

Power Packs, Battery Packs and Charger

What type of battery is used in Enova’s digital battery packs?

Enova’s digital battery packs use rechargeable lithium-ion batteries.

How long does an Enova digital battery pack last?

Battery life on a single charge varies depending on the battery pack used with each specific Enova surgical headlight.

PP2 Battery Life
5-10 hours with Cyclops XLT-125
2.5-5 hours with Cyclops XLT-225

PP4 Battery Life
9-24 hours with Cyclops XLT-125
5-10 hours with Cyclops XLT-225

How long does it take to charge an Enova battery pack?

Charge time for Enova digital battery packs is approximately three hours. We recommend that batteries not be left on the charger for weeks or months at a time. Left on a charger over night, over the weekend, or up to a week is fine, but not longer.

Do battery packs need to be fully discharged prior to recharging?


How often should an Enova battery pack be recharged?

We recommend that the battery pack be charged nightly, similar in frequency as recharging a cell phone.

How many times can an Enova battery pack be recharged before replacing it?

Enova battery packs are guaranteed for one year. Typically they are replaced after three - five years of use.

At what voltage does the Enova battery charger operate?

100 to 250 volts. The charger contains a universal transformer that adjusts current automatically.

What type of cord is included with the Enova battery charger?

The cord included with the Enova battery charger is a North American three-prong hospital grade cord. Euro, UK or Australian cords can be substituted.

What kind of warranty comes with an Enova headlight?

Enova provides a five-year warranty on LED chip and lamp assembly, a one-year warranty on the battery packs and accessories.

Do you still carry Enova Halo surgical headlights?

Halos were discontinued in 2008. We supply Halo batteries only and we do not repair Halos. The Halo headlight was the first LED headlight designed for surgical use and was very popular. They were available with batteries mounted on the headband (FreeStyle) and with batteries worn on a belt (UltraLight). As LED technology advanced, Enova introduced newer headlight models and discontinued manufacturing Halo headlights.

If you own a Halo headlight and need service, please contact Enova.  Most models are now out of warranty, and though Enova continues to support and repair most Halo versions, it may be a good time to trade-in your Halo for newer Enova model. Our Trade-In Program allows you to trade in your current LED surgical headlight for a new Enova headlight at a discount. Below is a comparison between Enova’s newest headlights and the Halo 5000.

  Cyclops XLT-225 Cyclops XLT-125 Iris D-200 Iris S-100 Halo 5000
Brightness  225,000 lux 125,000 lux 200,000 lux 100,000 lux  50,000 lux
Adjustable brightness Yes Yes Yes Yes No
Color Temperature 6100 degrees K 6100 degrees K 6100 degrees K 6100 degrees K 6100 degrees K
Weight  11 oz 7 oz 9 oz 7 oz 11 oz
Lamp Single lamp Single lamp Dual lamp Single lamp Dual lamp
Reflector Silver ionized
Silver ionized
Silver ionized
Silver ionized
Used with Loupes Yes Yes Yes Yes Sometimes
Digital battery pack 2 or 4 cell
2 or 4 cell
4 cell
2 or 4 cell
Battery location On belt On belt On belt On belt On belt or headband
Battery life indicator Yes Yes Yes Yes No
Charge time 3 hours 3 hours 3 hours 3 hours 4 hours
Warranty 5 year 5 year 5 year 5 year 5 year
Where manufactured USA USA USA USA USA
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