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Will a fluorescent lighting fixture that uses 4 4 ft T8 bulbs operate with only 2 bulbs installed?
The lighting fixture may have 1 ballast, or 2 ballasts. If it has only 1 ballast all 4 lamps must be good in order for it to work properly. It is recommended to replace all lamps at the same time, rather than just the one that is bad. Testing has shown that replacing just one, will shorten the life of the others controlled by that ballast. If 2 ballasts are used, each one is wired to 2 lamps. So, if one pair has a problem the other 2 will still work. To find out how many ballasts you have you must open the fixture. You can't miss them they are the big black rectangular objects.
What are black holes in the sun?
These are called sun spots.
What causes black spots on the leaves of a lantana bush?
Black spots on the leaves of a lantana bush are typically caused by fungal diseases such as anthracnose or sooty mold. These diseases thrive in humid conditions and can be spread through water or air. Proper pruning, improving air circulation, and avoiding overhead watering can help prevent these diseases.
Where would the black spots appear on an emulsion prepared 3 hours after the pulse?
Exterior of the cell
Do tulips spread?
Sometimes chipmunks (and squirrels) will dig up bulbs that are close to the surface, and then store them underground in a different location. If a chipmunk is scared off before it can store the bulbs, the bulbs are abandoned in random spots and take root. Tulips do not spread on their own, except in the sense that they form new bulbs each year (much like a garlic clove turns into a head of garlic).
What causes black spots to appear on golden retriever's tongues?
The black spots on dogs' tongues are just birth marks.
How can I test fluorescent bulbs to ensure they are functioning properly?
To test fluorescent bulbs, you can use a multimeter to check for continuity and voltage. You can also visually inspect the bulb for any dark spots or discoloration, which may indicate a problem. Additionally, you can try replacing the bulb with a known working one to see if the issue is with the bulb or the fixture.
What causes black spots on face and hands?
Due to Sun rays
What causes black spots to appear on a cat's nose?
Black spots on a cat's nose are typically caused by pigmentation changes or freckles, which are harmless and common in cats.
What causes bearded dragons to develop black spots on their back?
Bearded dragons develop black spots on their back due to stress, temperature fluctuations, or shedding issues.
What are the causes and treatment options for black spots in a dog's eye?
Causes of black spots in a dog's eye can include aging, injury, or underlying health conditions. Treatment options may include medication, surgery, or monitoring the spots for changes. It is important to consult a veterinarian for proper diagnosis and treatment.
What causes betta fish to develop black spots on their bodies?
Betta fish develop black spots on their bodies due to a genetic condition called melanism, which causes an increase in the production of melanin, the pigment responsible for dark coloration in animals.
What causes avocados to develop black spots?
Avocados develop black spots due to a fungal infection called anthracnose, which is caused by a fungus called Colletotrichum gloeosporioides. This fungus thrives in warm and humid conditions, leading to the formation of black spots on the fruit's skin.
What are the possible causes of black spots on broccoli and how can they be prevented or treated?
Black spots on broccoli can be caused by fungal diseases such as black rot or black leg. To prevent these spots, ensure proper spacing between plants, adequate air circulation, and avoid overhead watering. If black spots appear, remove the affected parts and treat the plant with a fungicide labeled for use on broccoli.
Is there a scientific explanation to the tiny dots flies make on hanging light bulbs?
Just spots of excrement that the bulb heats and causes to turn dark or burn.
What causes the presence of black spots inside sweet potatoes?
The presence of black spots inside sweet potatoes is typically caused by a fungal infection, such as black rot or Fusarium wilt. These fungi can enter the sweet potato through wounds or cuts in the skin, leading to the development of black spots as the infection spreads.
What are the possible causes of black spots on walls and how can they be effectively treated and prevented?
Possible causes of black spots on walls include mold, mildew, water damage, or soot. To effectively treat them, use a mixture of water and bleach to clean the affected area. Prevent future black spots by ensuring proper ventilation, fixing any leaks, and maintaining low humidity levels in the room.
