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69 results for “light emitting diodes”
Data from: Transition from conventional to light-emitting diode street lighting changes activity of urban bats
Light pollution is rapidly increasing and can have deleterious effects on biodiversity, yet light types differ in their effect on wildlife. Among the light types used for street lamps, light-emitting diodes (LEDs) are expected to become globally predominant within the next few years. In a large-scale field experiment, we recorded bat activity at 46 street lights for 12 nights each and investigated how the widespread replacement of conventional illuminants by LEDs affects urban bats: we compared bat activity at municipal mercury vapour (MV) street lamps that were replaced by LEDs with control sites that were not changed. Pipistrellus pipistrellus was the most frequently recorded species; it was 45% less active at LEDs than at MV street lamps, but the activity did not depend on illuminance level. Light type did not affect the activity of Pipistrellus nathusii, Pipistrellus pygmaeus or bats in the Nyctalus/Eptesicus/Vespertilio (NEV) group, yet the activity of P. nathusii increased with illuminance level. Bats of the genus Myotis increased activity 4·5-fold at LEDs compared with MV lights, but illuminance level had no effect. Decreased activity of P. pipistrellus, which are considered light tolerant, probably paralleled insect densities around lights. Further, our results suggest that LEDs may be less repelling for light-averse Myotis spp. than MV lights. Accordingly, the transition from conventional lighting techniques to LEDs may greatly alter the anthropogenic impact of artificial light on urban bats and might eventually affect the resilience of urban bat populations. Synthesis and applications. At light-emitting diodes (LEDs), the competitive advantage – the exclusive ability to forage on insect aggregations at lights – is reduced for light-tolerant bats. Thus, the global spread of LED street lamps might lead to a more natural level of competition between light-tolerant and light-averse bats. This effect could be reinforced if the potential advantages of LEDs over conventional illuminants are applied in practice: choice of spectra with relatively little energy in the short wavelength range; reduced spillover by precisely directing light; dimming during low human activity times; and control by motion sensors. Yet, the potential benefits of LEDs could be negated if low costs foster an overall increase in artificial lighting.
Effects of Light Emitting Diodes (LED) Therapy in Rugby Athletes
ClinicalTrials.gov study NCT03728439. IPD Sharing: NO. Countries: 1. Publications: 5.
Light-emitting Diodes (LED) Phototherapy for Hyperbilirubinemia of Term Newborn
ClinicalTrials.gov study NCT01136577. IPD Sharing: Not stated. Countries: 1. Publications: 25.
Light Emitting Diode for theTreatment of Genitourinary Syndrome of Menopause Associated With Breast Cancer Treatment
ClinicalTrials.gov study NCT03833726. IPD Sharing: Not stated. Countries: 1. Publications: 7.
Light-emitting-diode in Diabetic Subjects
ClinicalTrials.gov study NCT03369834. IPD Sharing: UNDECIDED. Countries: 1. Publications: 1.
Reverse Phototherapy With Super Light-emitting Diode(Super-LED) for Hyperbilirubinemia in Term and Late Preterm Infants
ClinicalTrials.gov study NCT01340339. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Feasibility of Polychromatic Light Emitting Diode System to Reduce Pain
ClinicalTrials.gov study NCT03246282. IPD Sharing: NO. Countries: 1. Publications: 62.
Effect of Light-Emitting Diode on the Strenght and Resistence Capacities of Cycling Athletes
ClinicalTrials.gov study NCT03225976. IPD Sharing: NO. Countries: 1. Publications: 2.
Use of 405nm Blue Light Emitting Diode in the Treatment of Women With Vulvovaginal Candidiasis: a Clinical Trial
ClinicalTrials.gov study NCT03075046. IPD Sharing: NO. Countries: 1. Publications: 2.
Light Emitting Diode (LED) for the Treatment of Wrinkles
ClinicalTrials.gov study NCT00818246. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Tumor Ablation With Talaporfin Sodium and Interstitial Light Emitting Diodes Treating Hepatocellular Carcinoma (HCC)
ClinicalTrials.gov study NCT00122876. IPD Sharing: Not stated. Countries: 3. Publications: 2.
High Fluence Light Emitting Diode-Red Light (LED-RL) in Human Skin
ClinicalTrials.gov study NCT02630303. IPD Sharing: Not stated. Countries: 1. Publications: 6.
Effects of Phototherapy by Low-level Light-emitting Diode Therapy (LEDT) on Clinical, Biochemical, Biomechanical, Histologic and Genetic Responses of Muscle Performance of Young Males Submitted to Phy
ClinicalTrials.gov study NCT01770938. IPD Sharing: Not stated. Countries: 1. Publications: 2.
Acute Effect of Phototherapy With Light Emitting Diode (LED) on Muscle and Pulmonary Oxygen Consumption on Diabetes Mellitus
ClinicalTrials.gov study NCT01889784. IPD Sharing: NO. Countries: 1. Publications: 9.
Chronic Effects Using Light-Emitting Diode Therapy (LEDT) During a Resistance Exercise Protocol for Asthmatic Patients
ClinicalTrials.gov study NCT03112239. IPD Sharing: NO. Countries: 1. Publications: 2.
Light-Emitting Diode (LED) Light for Seasonal Affective Disorder (SAD) Treatment
ClinicalTrials.gov study NCT00114322. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Effect of Light-emitting Diode (LED) Photobiomodulation Therapy on Muscular Fatigue in University Handball Athletes
ClinicalTrials.gov study NCT03972007. IPD Sharing: NO. Countries: 1. Publications: 3.
Effects of Phototherapy by Light-emitting Diode Therapy (LEDT) on Clinical, Biochemical and Biomechanical of Muscle Performance in Athletes
ClinicalTrials.gov study NCT01770977. IPD Sharing: Not stated. Countries: 1. Publications: 3.
Data from: Transition from conventional to light-emitting diode street lighting changes activity of urban bats
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Table S1: Average photosynthetic photon flux densities (PPFD) used as six lighting treatments in the trial. The lights were on for a photoperiod of 16 h, and the respective daily light integral (DLI) provided by the light-emitting diode (LED) lights, sunlight, and the sum of LED + sunlight were calculated for all treatments and each cultivar.
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