ATTENTION: By our experience, due to the high quality of the polymerization, the reduced drying times and the long life of the lamp make it a very interesting investment, even when two are used as recommended for the cello. In addition, the ease of use thanks to the dimmer allows for significantly better results than other non-dimmerable UV sources. All this means that the apparently high cost turns out to be clearly advantageous in the long run. We invite you to carefully read the instructions for use and watch the video before installation and use.

Technical details:

• Power: 300 W
• Max. light output at a distance of 4 cm 3000 W
• UV wavelength 365 nm
• LED beam angle 120°
• Lamp dimensions: 770 mm x 145 mm x 105 mm
• Working time > 50,000 hours
• Black anodized aluminum lamp body
• 120 high-quality LG LEDs: LG3535
• Adjustable voltage 85 V~265 V
• Maximum recommended distance for varnish drying 1 m
• Fan-cooled lamp
• Working temperature range -20°C - +40°C
• External dimmer and driver with IP65
• Lamp without IP
• Handle for carrying the lamp
• Mounting brackets
• High-performance external dimmer with aluminum housing
• EU plug

TIPS FOR USE
The single lamp works very well for violin and viola. Being 77 cm long it covers the length of the instrument sufficiently. In a UVbox of adequate size to allow the rotation of the instrument and with the walls covered with reflective material the light will spread uniformly and sufficiently to dry even the lower and upper parts not directly reached by the light emitted by the LEDs. To improve uniformity it is recommended, but not essential in an efficient UVbox, to add UVA 546784 or UVC 546785 LED strips at least one above and one below the instrument.
For cello the length of the lamp may not be sufficient even in a UVbox correctly covered with a good reflective material such as diamond Mylar. The UVbox for cello should also allow the rotation of the instrument to uniform the exposure. Our advice is to use two lamps mounted vertically staggered and on two opposite sides to cover the length of the instrument and possibly add the LED strips above and below as described above. Rotation of the instrument is recommended.
N.B.: the use of two lamps requires effective ventilation to dissipate heat and careful use of the power emitted adjustable with the dimmers.

Safety notes

• The lamp must be protected from excessive humidity. For this purpose, separate air ducts are recommended. An inlet/outlet air duct with an extractor and a humidification duct with external installation of the humidifier so that both can be operated separately.
• The lamp should be installed outside the UV chamber leaving only the front part with the LEDs inside the chamber to ensure that the hot air does not raise the temperature inside the UVbox. The rectangular shape simplifies installation. Thanks to the air cooling directed towards the outside, the lamp only moderately heats the inside of the UVbox even during long periods of operation. However, the installation of temperature and humidity sensors are recommended.
• The air produced inside the UVbox is toxic and the air sucked in must be expelled outside the workplace or place of residence.

Important notes on use

Several tests have shown that treating wood under strong UV light causes some of the moisture to escape from the wood with a significant decrease in the moisture content of the wood being treated. The outside of the wood will dry faster than the inside and potentially damaging deformations may occur in unstabilized wood. To avoid this, humidity must be added to the air inside the UVbox while treating the wood or instrument. It has also been observed that without added humidity, wood aging is significantly slower. To achieve wood aging in an optimal time, humidification of the air using a humidifier is necessary. Humidity and temperature play an important role in artificial wood aging. The higher the temperature and humidity, the greater the aging in UV light. Other studies also show a correlation between air exchange and wood aging indicating that the greater the air exchange inside the UVbox the faster the wood ages. This is thanks to the constant presence of oxygen in the internal air drawn in which promotes the surface oxidation of the wood. In any case, we recommend not subjecting in the white or varnished instruments to extreme temperatures or humidity levels to avoid compromising the bonding and excessive stress on the structures. Relative humidity between 40% and 60% and temperatures between 25° and 35° Celsius are acceptable safety limits. Many instruments will over time be subjected to humidity levels and temperatures well above and below these limits but in UV boxes we recommend not going too far beyond the safety limits. The instrument must rotate in a closed structure with a reflective film (Mylar) on all internal sides to ensure uniform exposure of all parts of the instrument, both in the white and varnished.

Summary of important points:

• Never look at the UV lamp turned on without adequate protective glasses and in any case do so only if necessary and for the shortest possible time
• The UVbox should have a contact microswitch on the door to eliminate the possibility of being hit by UV rays
• The UVbox should have an airtight seal to prevent internal air from spreading into the work environment
• The suction air tube must discharge outside the place of work or stay
• The inside of the UVbox must be covered with reflective film (Mylar) on all sides
• The instrument must rotate to ensure uniform exposure of all parts
• Learn to dose the power using the dimmer by experimenting to learn the right combinations based on the type and size of the UVbox and the results you want to achieve and the times to get there
• Do some tests to find the right distance of the instrument from the lamp based on the type and size of the UVbox and the power used
• The UVbox must be humidified to avoid damage to the wood or in the white or varnished instrument
• Internal temperature and humidity sensors are recommended

N.B.: For safety the cooling fans work with a separate circuit and even if the lamp is OFF. The fans continue to run to ensure the LEDs are cooled. We recommend leave the fans running for a few minutes after turning off the lamp and to turn off the fans, unplug the lamp or use a socket with a switch.

UV lamps: pay attention to their correct use
Short wavelength UV light is dangerous for humans. In addition to sunburn, this light can produce inflammation of the cornea and retina of the eye. Without forgetting that ultraviolet radiation, in all its UV-A, UV-B and UV-C components, is classified by the International Agency for Research on Cancer (IARC) in Group 1 of agents that are certainly carcinogenic to humans. For this reason, the use of UV rays in working environments should always respect some essential conditions:

• use in the absence of people and in ventilated environments with air recirculation
• use of adequate skin and eye protection
• do not look directly into the UV light
• Do not stay or work in the environment where UV light is operating
• use safety microswitches that turn off the lights when doors or hatches are accidentally opened

ATTENTION:

• Electrical systems are always potentially dangerous and if poorly constructed can cause electric shocks, even fatal ones, or fires. We also recommend that you have the system installed by a certified electrician for your UV cabinet.
• UV lights are very harmful to the eyes, we recommend that you install a microswitch on the aperture to avoid accidentally looking at the UV light.