LightStim has been in business since 2002. LightStim for Wrinkles has gotten a lot of attention from big names in beauty like Marie Claire, InStyle, and Redbook. It won an American Spa Professional’s Choice Award, the Aestheticians’ Choice Award, and a Pure Beauty Award.
Using the Philips Luxeon Royal Blue and Deep Red products as an example, the respective conversion factors are approximately 0.07 and 0.03 lumens per milliwatt (lm/mW). However, these figures must be approached with some caution, as they apply to 450 nm and 660 LEDs only. If for example the peak wavelength of deep blue LED was 440 nm rather than 450 nm, the conversion factor would be 0.05 lm/mW. Similarly, if the peak wavelength of the deep red LED was 650 nm rather than 660 nm, the conversion factor would be 0.06 lm/mW. The Philips LED binning ranges are 440 to 460 nm and 650 to 670 nm respectively, which equates to (from FIG. 4) conversion factor uncertainties of +75%, -50% for blue and +60%, -30% for red. The above conversion factors are therefore decidedly approximate.
At the same time, other plant photopigments, including cryptochromes and phototropins, do have sensitivities (as measured in vitro) that extend into the ultraviolet, and likely respond under dim light conditions. However, these are likely suppressed under high light conditions by the xanthophyll process.
Angel Kiss promises fast results with this LED mask. They say you’ll see a difference in just three to five weeks. That may be because it incorporates red, blue, and green light and it covers your whole face at once. You can’t miss a spot when you’re wearing this.
As a reminder, photosynthetically active radiation (PAR) does not consider the spectral response of plants (FIG. 3); it simply represents the number of photons (quanta) per unit area per second within the range of 400 to 700 nm. With the availability of color-tunable LED modules for greenhouse lighting, horticulturalists will likely want to experiment with different SPDs for specific crops and flowering plants, as well as both the directionality and daily timing (photoperiods) of the luminaires. Regardless, being able to convert predicted and measured illuminance values to PPFD values for common light sources will certainly ease the communication problem between lighting designers and horticulturalists.
If the sky’s the limit, get one of the wide-spectrum red light devices like the , or the . These manufacturers offer money-back guarantees and decent warranties to protect you if you don’t get the results you desire.
The LightStim for Wrinkles is cleared by the FDA. It has a 90-day money-back guarantee with a 5-year warranty. It comes with a carry pouch and a sample of PhotoSerum that may enhance the healing process.
Like Baby Quasar’s MD Plus, the LightStim for Wrinkles uses a variety of colored lights to achieve the best results. It has 72 LEDs divided between Amber, Light Red, Dark Red, and Infrared. Just like the other home devices it requires three minutes on each section of skin. And yes, there’s an app for that. LightStim offers a free app download for iPhone that helps you time treatments while it gives you tips about skin care.
How horticulturalists choose to balance the ratio of red to blue light will likely depend on the specific plant species being cultivated and their stage of growth. Some plants like shade, while others prefer direct sunlight, with different SPD requirements. In addition, far-red 735 nm LEDs may be employed to induce flowering. Regardless, the above conversion factors will still be useful.
Prediction : I predict that as I increase the distance between the light source and the Canadian Pondweed (reducing the light intensity), the volume of oxygen produced within the time limit (the measure of the rate of photosynthesis) will decrease.
Hypothesis:Photosynthesis is a process by which green plants and certain other organisms use the energy of light to convert carbon dioxide and water into the simple sugar glucose....
Realizing the fact that light intensity is another variable which may affect results, the team measured the intensity of the different color lights.
CONCLUSION AND CONCEPTS
During the experiment, some of the leaf disks would not rise from the bottom of the beaker.
The MD Plus uses red, amber, and infrared LEDs for maximum effect. Each treatment takes a little less than 15 minutes. Baby Quasar says to imagine that your face is divided into sections. You’ll hold the light against each section for three minutes, then move to the next area. The MD Plus automatically shuts off the light after three minutes in case you forget to time it.
Other photopigments regulate phototropism (leaf and stem orientation) and circadian rhythms (for which blue light is the most effective), photomorphogenesis (plant shape), root growth, stomatal opening, chloroplast movement … the list goes on, as horticultural researchers continue to explore the role between lamp SPDs and optimal plant health and growth. (See for an informative summary of plant photobiology.)