are used to allow the user to so that many of these LEDs can be used in both Reef and high light planted aquariums.
This use of colors such as red and green is popular in particular for high end planted aquarium aquascapers looking to bring out certain colors, which I cannot argue this as these do, but I admit I prefer a more natural high noon daylight look in planted aquariums or a more natural under water look one would find on a reef than many of these lights produce.
Thus, partial hydrogenation may end up in the formation of a quite complex mixture of reaction products, depending on which of the double bonds are hydrogenated, what kind and degree of isomerisation occurs and the relative rates of reaction.
Chemistry for Biologists: Photosynthesis
The newer Halogen Quartz Iodide (HQI) lighting systems are used mostly on saltwater reef aquariums. HQI bulbs are commonly offered with spectrums of 10,000K and 20,000K. These high-intensity bulbs help corals thrive, but give off less heat than regular metal halide bulbs. HQI Double Ended Metal Halide bulbs have been used in Europe for many years have gained popularity in the U.S. among aquarium hobbyists in the last several years.
Double Ended MH HQI bulbs offer many of the same features as standard mogul base Metal Halide bulbs but are designed differently. These bulbs are much smaller than mogul base screw in Metal Halides and are double ended.
The benefits of using HQI Metal Halide bulbs are that they offer a more clean color spectrum (useful light energy/responsive wavelength), are more efficient, produce slightly less heat, and last longer than standard Mogul Base metal halide lamps.
Oxygen is a chemical element with symbol O and atomic number 8
There are few drawbacks to the SHO light for aquarium use; one such drawback is that in any "tube light" some of the light that shines up from each tube just reflects right back into the tube and is lost (this is called "Restrike"). HOWEVER, the spiral design & especially the use of an optional reflector tends to limit this minor problem and based on extreme plant growth achieved this is obviously not as much a factor as some may claim (this is essentially a problem with ALL compact Fluorescent lights).
As well, while the SHO does not produce nearly as much heat as a Metal Halide, the simple fact of the wattage used by these lights still produces heat, so a well vented hood or the use of a reflector is advised ( light should be placed in a ventilated hood/canopy as trapped moisture can quickly damage any light whether an SHO, T5 or LED).
Finally the only other potential negative is that these SHO lights are more of a DIY lighting application, not an out of the box and place on your aquarium light applications as with many T5 & LEDs; so those who do not have DIY abilities, time, or simply desire an out of the box light might find this is not the light for them.
The Function of ATP in Photosynthesis & Respiration
The T2 lights measure only 7 mm and allow for several bulbs in a small space. A 13 watt 20 inch T-2 Bulb (6400 K) produces 950 lumens which is 73 lumens per watt in a very small space with low wasted green/yellow light energy that is often found in other Power Compact Lights!
As little as 1 watts per gallon (low light) to 1.75 watts per gallon (high light) for a planted aquarium is all that is needed from these T2 Lights! (depending upon tank depth, and not for tanks over 18 inches max; consider SHO for tanks over 18 inches).