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Questions tagged [ballast]

Use this tag for questions about ballasts used with fluorescent or other types of discharge lighting.

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43 views

Fluorescent Lights Turning on Slowly

I have a Philips fluorescent light fixture in my kitchen. It was installed in the mid-1990s, so it uses an electronic fast-start ballast. The lights were not turning on at all, so I replaced the ...
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1answer
32 views

8 Foot T12 Flourescent ballast Requirements

I would like to understand how to evaluate a ballast and determine if it is suitable for a T12 8 foot flourescent bulb. What is the process / questions to ask? I have several known good working ...
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2answers
44 views

A cornucopia of doubts on ballasts?

I want to buy and use some 54W T5 lamps. I have found some ballasts in a nearby shop. I have the following questions: One of them advises 1x110W T10/T12 or 1X85W T12. Can I use it on two 54W T5 lamps?...
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174 views

Can a T8 bulb work with a T5 ballast?

What (if any problems) will happen if a T8 bulbs are used with T5 ballasts?
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1answer
48 views

T5 bulbs with T8 Ballasts

Can 4 ft T5 bulbs be used with T8 ballasts? Why?
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1answer
52 views

Should the ballast be replaced?

As a follow-on question to: Why fluorescent lighting tombstones melt? I do not know what caused a massive current to melt the tombstone: was it the ballast? The MELTED tombstone will be replaced, ...
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1answer
68 views

what is the likely cause of a single fluorescent tube not working in a light fixture with a ballast that supports two tubes?

So I've got a warehouse with many fluorescent tube fixtures. We are slowly transitioning piecemeal to LED as we run out of replacement ballasts and bulbs. I've got a fairly simple troubleshooting ...
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1answer
97 views

laundry room fluorescent lights dim and flickering

Starting about a week ago, the fluorescent lights in my laundry room became dim and flickering. I bought two tubes from lowes (F40KB-ECO 48", I don't think that's relevant but anyway), put them on, ...
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1answer
802 views

How can I tell whether a fluorescent ballast is T8 or T12?

Is there a way to tell from a ballast's specifications (voltage, wattage, how many lamps it handles, etc.) whether it is a T8 or T12 ballast? Or do I need to look for the manufacturer's part number to ...
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3answers
187 views

Can an electronic ballast be used for a G23 lamp?

I have a Rayton R3 UVB lamp for phototherapy. It consists of a this PL-S 9W/01/2P bulb with a G23 base, and the ballast is magnetic 120v/60hz. I would like to swap the ballast for a 240v/50hz ballast,...
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0answers
50 views

Can an F40T8 4ft ballast power an F36T8 2ft bulb?

I have some F36T8 2ft bulbs that I need to power, unfortunately the closest ballast I can locally find are rated for 4ft F40T8 bulbs. Can I still use them, or will it be a hazard?
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274 views

How to bypass ballast for T8 4ft LED tube?

I successfully bypassed a ballast to install a T8 4ft LED tube. But this time, I have a different kind of ballast (HOWARD INDUSTRIES M2/40RS-120, 60 HZ MAGNETIC BALLAST), one that can connect to 2 ...
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3answers
3k views

Is a ballast required, or merely acceptable, for this Philips InstantFit LED tube?

Rather than replace a dead ballast in a fluorescent fixture, I've decided to simply bypass and move to LEDs. However, I think I may have grabbed the wrong kind of replacement tubes the other day in ...
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3answers
1k views

Installing new T8 ballast

Lights stopped working on a 48" 2-lamp fluorescent fixture in the laundry room. Figured this to be a ballast issue, but I bought new LED tubes in addition to a new T8 ballast. I put the new bulbs in ...
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1answer
67 views

Bizarre Behaviour with CFL Ballast (light turns on when I touch the physical ballast)

I recently took an old ballast I had lying around and installed it as a shop light over my desk. I took an extension cord and stripped the wires and connected all the whites, all the blacks, and ...
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1answer
427 views

Replace fluorescent bathroom light with an LED (PL26E/H/841/LED)?

I'm replacing my bathroom compact, horizontal fluorescent light bulbs in my bathroom fan. It is a 4-pin light hooked up to a ballast. I have purchased an LED replacement from Home Depot. Specifically,...
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1answer
976 views

HPS bulbs and ballast wattage compatibilty vs replacement technologies

I have a few questions regarding HID lamps, their ballasts and their replacement options and strategies. I have been spending a large amount of time researching this subject and I still have ...
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1answer
1k views

Shock when Installing Fluorescent Bulb 50VAC between frame and GLASS of Lamp - New Ballast Installed

I have a ballast that we are replacing in a church. There are approximately 12 dual lamp T12 Fixtures in parallel drops. The fixtures are all in line -- but L1, Neutral and Ground are parallel drops. ...
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1answer
248 views

Why new 32W circular fluorescent light bulbs keeps getting blown?

Recently one of my ceiling light's bulb just got blown after lasting for quite a few years. I tried to replace it with a new one and the moment I turned it on, the bulb would blink once quickly say ...
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1answer
159 views

Light kit ballast replacement

I am new to Home Improvement and recently hear a pop!, then my overhead lighting in my small kitchen stopped working. Lowe's sold me a replacement ballast (good enough to remove the old ballast, and ...
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1answer
651 views

Two bulb fixture with 2 ballasts

I have two T12 Rapid Start ballasts for a two light fixture. I need to change out one ballast because of one ballast was bad. I bought a 1 or 2 bulb ballast and have wired up the bulb different ways ...
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1answer
759 views

Why do LED retrofit instructions say to leave the ballast in the fixture?

I'm looking at retrofitting fluorescent fixtures in my basement for single-ended LED tubes. The electrical and wiring concepts I have down; I could probably do it with my eyes closed (but anyone ...
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4answers
12k views

How do I choose the correct fluorescent ballast?

I have a fluorescent fixture which takes tubes. The fluorescent ballast has gone bad, or I want to upgrade to the latest. How do I select the correct ballast for my fixture?