Lomablu (SMD2835)

Lomablu (SMD2835)

Lomablu SMD 2835 Delivers M/P Ratio<0.34

Vestralux Lomablu provides a unique solution offering light with minimal blue content and an M/P Ratio of less than 0.34. Exposure to the blue wavelengths of light during evening hours (or pre-sleep hours for shift workers) suppresses the release of melatonin and disrupts sleep (especially restorative sleep) and circadian rhythms.

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Feature

The M/P ratio(Melanopic/Photopic Ratios )

At the beginning of this century, a novel photopigment, melanopsin, was discovered in a sub-class of retinal ganglion cells and its action spectrum was described. Shortly after, it became evident that melanopsin is a major contributor to non-visual eye-mediated effects of light on e.g. the circadian, neuroendocrine and neurobehavioral systems. First applied studies pointed out that these non-visual effects of light are relevant for wellbeing, performance and general health.

We aim to show some validity of melanopic lux in humans using a seminaturalistic setting. Thus, we analyzed the impact of different lighting conditions on melatonin suppression and subjective sleepiness by calculating effective illuminance based on single photopigment sensitivities. We retrospectively analyzed the data from our laboratory, where young participants were exposed to a total of 19 different polychromatic lighting conditions, for 30 minutes in the evening and one hour prior to habitual bedtime. Saliva samples for melatonin concentration measures and subjective sleepiness were regularly assessed. The photopic illuminance of all lighting conditions ranged from 3 to 604 lx. Stepwise forward and backward regression analyses showed that melanopic lux was the best predictor for changes in melatonin concentrations (but not subjective sleepiness); R²=0.16 (p<0.05). In addition, we found a significant dose-response relationship between melanopic lux and changes in melatonin concentrations for 18 different lighting conditions (adjusted R²=0.52; p=0.004), similarly to what was previously reported for photopic lux.

Our results indicate some new relevance for the application of M/P ratio as an additional metric to predict non-visual light effects of electrical light sources for nursing homes, work places, and homes.

Features

※ Mac Adam 3/5-step binning

※ ANSI compliant color bins

※ Industry standard form factors and footprint

※ Excellent lumen maintenance

Benefits

※ Health care – Quality of sleep

※ Vividness eye protection

※ Competitive system performance and cost

※ Ease of design and rapid go-to-market

※ Highly reliable fixture quality

  • Applications

※ Residential

※ Children rooms

※ Desktops

※ Hospitals

※ Other customized lighting areas

Product specifications

Mechanical Dimensions

Nomenclature

Chromaticity Diagram

Bin Data

Performance

Performance Characteristics

Product performance at specified test current, Ta=25℃  

Maximum ratings characteristics at Ta=25℃

Reliability Tests

Characteristic Curves

Figure 1. Relative Spectra Power Distribution Characteristics

              

Figure 2. Typical Forward Current vs. Voltage

Figure 3. Typical Normalized Luminous Intensity vs. Forward Current

Figure 4. Typical Luminous Flux vs. Forward Current

Figure 5. Typical Luminous Efficacy vs. Forward Current

Figure 6. Typical /Polar Radiation Pattern

Packaging

Label Information

Reel Dimensions

Tape Dimensions

Packaging Specifications:

Packing Detail 

Precautions

Cleaning, Handling Precautions, and Storage, Anti-static protection
Cleaning

All products are cleaned thoroughly before shipping, which means that in most normal cases there is no need to clean before use. In cases where a minimal amount of dirt and dust particles have come in to contact with the product, it is advised to follow these steps:

1. Handle in a clean environment.

2. Try swabbing gently using lint-free swabs.

3. If needed, the use of lint-free swab and IPA (isopropyl alcohol) can be used to gently remove dirt from the surface. Do not use other solvents as they may directly react with LED emitting region.

4. Do not use ultrasonic cleaning that the LED will be damaged.

5. Do not use ultrasonic cleaning as this may damage the LED.

Handling

If it is necessary to handle the product, it is recommended to use anti-static tweezers. However, do not touch the lens with tweezers or fingers.

1.  Do not touch the lighting emitting surface (LES) in any circumstance.

2. Users should wear the anti-static gloves or an anti-static wrist band.

3. When handling the SMD, users should use anti-static tweezers.

(Especially, the sharpened-tips of the tweezers would have high possibility of giving a physical defect to the SMD)

Figure 1 Proper tweezers selection

Anti-static tweezers  Normal tweezers

Figure 2 Proper use of tweezers

Storage

1.  Do not open the moisture-barrier packaging (MBP) before the products are ready to be used.

2.  Before opening the MBP: To avoid moisture penetration, we recommend storing in a dry box with a desiccant. The recommended storage temperature range is 5℃ to 30℃ with a maximum humidity of RH60%.

3.  After opening the MBP: If unused SMDs remain, we recommend storing in a moisture proof bag or in the original packaging bag with a moisture absorbent material. There is a limited exposure time before damage to the LED may occur during the soldering operation. The table listed below specifies the maximum exposure time in days depending on temperature and humidity conditions. If the moisture absorbent material (silica gel) has faded away or the LEDs have an exposure time longer than specified maximums, baking treatment should be performed at 60℃ for 24 hours.

Anti-static protection

1. LED package is extremely sensitive to static electricity. It’s recommended that anti-electrostatic glove and wrist band is necessary when handling the SMDs. All devices are also be grounded properly as well.

2. Protection devices should be designed for SMDs driving circuit.

Soldering precautions, Conditions and Process

1. Over-current-proof

Customer must apply resistors for protection; otherwise a slight voltage shift will cause large current change (Burn out will occur).

2. Soldering Conditions

2.1 Pb-free solder temperature profile:

2.2 Reflow soldering should not be done more than two times.

2.3 When soldering, do not put stress on the LEDs during heating.

2.4 After soldering, do not warp the circuit board.

3. Soldering Iron

The soldering iron temperature should be less than 350℃ and should only contact each terminal for 3 seconds at once. The soldering iron capacity should be 25W. After first contact, wait for two seconds before further contact intervals of each terminal. Be careful because hand soldering is usually the cause of damage to the product.

4. Repairing

Repair should not be performed after the LEDs have been soldered. When repairing is unavoidable, a double-head soldering iron should be used (as below figure). It should be confirmed beforehand whether the characteristics of the LEDs will or will not be damaged by repairing.

Resource

Vestralux is a brand owned by Wuxi SeniorLED illumination engineering & Research center in association with Jiangnan University, faculty of Science. We are mainly focused on well-being lighting and special high end LED source development. Major products include low wavelength light LED source with High CRI and high efficiency simultaneously, sunlight simulated LED source and special waveband LED source for grow lighting.

Vestralux is dedicated to high quality, healthy lighting:

“9”: The accuracy of lead time up to 94.38%;

“9”: High CRI 95 and high luminous efficacy 140lm/w simultaneously;

“5”: Color tolerance no more than 5;

“6”: 6 invention patents of light source.

For further company or product information, please visit us at https://www.vestralux.com.