Do LED Aquarium light fixtures really cost more than other lighting fixtures?
This comparison takes into account the initial setup, and continued cost of lighting a beautiful aquarium over a 1-2 year period. It will show that LED's are actually the cheapest to keep and maintain.
Currently fluorescent light fixtures (VHO) are the least expensive to purchase while LED is the most expensive with Metal Halide (HQI) somewhere in the middle.
The first thing to be considered is bulb replacement. The VHO and HQI bulbs need to be replaced every year, while the LED lasts 7 -10 years.
The second consideration is heat. You might not think of heat when referring to lighting, but heat is an issue for aquariums. HQI produce so much heat that chillers are often used to help lower aquarium temperatures. This often requires an extra pump to help run water through the chiller itself. VHO fixtures in general do not produce enough heat to require a chiller but some of the high output fixtures that…
Light has been around since the day God said, “Let there be light.” The world has never been without light, since those words have been spoken. However, there has been many moments of darkness. Possibly the most significant is when darkness fell over the earth for three hours when Jesus was being crucified on the cross. However, there are many other moments darkness is prevalent. A typical night will consist of over nine hours of darkness in most places, not to mention the darker times of dusk…
School drama department needs to upgrade their lighting system to give students an equal understanding of lighting in the theatre in full, such as the hanging, programing, and production process.
With a lack of lighting fixtures, students lack the ability to learn about the hanging…
• Best lights for indoor growing
• These lights have the ability to cover up larger area.
• They normally have longer size,
• Generally cheap in price
• Frequent Replacement issue during the phase of plant growth.
• Are not helpful for the period of vegetative growth
• Are not helpful at the flowering stage.
Compact Light Pros and Cons
• CFL Bulbs are energy efficient and Good for Home growers
• These Bulbs can easily fit in normal light socket and does not…
Short introduction –
ASTM standards are consensus standards for systems, services, materials and products. ‘ASTM International’ is one of the largest voluntary standard developing organization in the world. It is a non-profit organization that provides a forum for the development and publication of international voluntary standards. There are approximately 12,575 ASTM standards that operate globally.
TESTING ASTM STANDARDS-
There test methods help in the determining of…
test apparatus is employed ( 1157).” This system similarly underwent heavy scrutiny. Alignment was of great concern and checked throughout the manufacturing process as it heavily effects the loading and modal patterns of the system (Figure 3.6).
Figure 3.6 Alignment assurance midway through machining the grips (left). Fully assembled grip alignment (right).
3.3.4 Compliance Check
Compliance of the system was verified and subtracted from the experimental load-displacements. The…
You do not need to be a professional painter to complete an interior painting project. However, while some ambitious people will also do exterior painting on their own, most homeowners choose to hire professional painters for their house painting needs. Whatever the case may be, here are a few tips for doing residential painting successfully.
For interior painting, prepare the room by emptying it of furniture, covering the floor with a drop cloth taped to the floor boards, removing outlet…
The room is illuminated by one light source in the top left center, which allows the areas where the light is hitting to be prominent. The faucet seems polished and new, contrasting with the dark stained walls of the background. The modest design of the faucet establishes a bold appearance through the help of the lighting; everything surrounding the woman and faucet is of less significance. The light also shines on the model’s hair and legs, captivating the audience with seduction and beauty.…
its occupants. He explains to his brother Theo, in a letter, that he uses the red and green in an attempt to express the terrible passions of human nature. The use of these colors helps to illustrate the intensity of the Café de la Gare and provoke the emotions of the viewer who may relate the bar scene to alcoholism or depression. He also balances the wooden browns and yellows of the lower half of the painting with a dark wooden clock adorned with a vibrant yellow face at the top of the…
For Semester one of QUT’s Essentially Dance, I had the opportunity to work as general crew. In previous productions I had only ever moved set or set up and operated the sound elements. This exposure to so many new aspects of theatre was an interesting and positive experience as I got to work with almost every department. This consequently provided me with many new learning experiences and new issues which I had not tackled previously.
One of these issues included trying to move the lifter out of…