I bought the plantmax kit it came with this bulb but I noticed every now and then it goes very bright for a few seconds then dims is this normal
389189
I have not noticed that happen. Im using a 400w hydrofarm all in one ballast and reflector with no issues. Sounds like a possible ballast issue. Good luck
389190
Never had that happen before, and I ran it for 18 hours a day for a month. I would get a new one just to be safe. And if the problem continues make sure everything is okay with your ballast. It really isn't risking it with the amount of voltage these things run at.
389191
A quality bulb would not dim after building intensity. Unfortuneatley these are not high quality in my experience.
1934684
I never kept the product because mine came broke on delivery. How ever Halogen lights can get warm and go off but not every 10 minutes, something is wrong with your light to make it over heat that quickly. Did you put a higher walt bulb in it by any chance? That might account for the problem otherwise you got a defected one contact them. Hope this helped Good Luck Shari
1924052
Right from the box I put it up and it took 2 sunny days and then it's been shinning bright at night ever since! I'm not a tech savy person in the slightest & I found it rather simple. I wonder if your specific one is defected or broken. My neighbors are all impressed with how bright it continues to illuminate.
1156936
Mine was dim from the get-go, so I didn't bother trying to get another one. Get a name brand bulb from someone reputable.
1771922
Yes, I wondered the same thing when I took the bulb out to remove the packaging around it. It seems to work fine. I took the bulb out of one of my other blacklights and it does the same thing, so maybe it's normal.
1838206
My plants have been growing great! I am not growing moderate-high plants though. It's a very bright light.
1696584
The bulb itself is dimmable, you just need to make sure that the ballast you're using is dimmable as well.
2101856
That is the symptom I had that caused me to buy this bulb.Installed it and have been good every since then. Call the seller and see what they say.
2133335
It sounds like you may have received a defective bulb. The one I have comes on at full power and does not change intensity or flash in any way.
1739461
Dear Harriette, i just can recomand this bulb, we are very pleased with it. It is not just bright enough, it is also saving a lot of energie. I am pretty sure that you will love it. It is work to try it out. Best regards Diana
750254
I've noticed mine does not start up very well. Twist the bulb as if removing and then reinstall. It won't start immediately. Also, the indicator is not an LED like it looks, just a lens to the inside. Turn of the lights or shield ambient light, it might be on, you just can see it.
473056
I'm not sure what gives, mine is still going strong since August at 16 hours a day....make sure that you can dissipate the heat from the bulb; ie: are you using a shroud around it? That would make it overheat maybe....or make sure your connections in your receptacle are set up right, ....or check to see if it being screwed in too tightly....also, keep your fingers off the bulb....oil from your hands can make it blow sooner than you would want it to. Hope that's a help.
1201254
The lighting is very bright. Very good for plants, too bright for atmosphere. I used for 1 hour then returned it.Now I use a light bar that had a remote for adjusting, brightness and color changes. My plants are doing fine. I think the name brand is Current.
2187099
It is normal John, mine does the same thing without any adverse effects. Actually, I noticed that after an extended period, they shut off completely. Keep in mind, its not the bulbs, but most likely our trucks that cause it. It just isn't a strong enough current to be noticeable with the standard bulbs.
823520
All of these mini florescent bulbs have small ballasts in the base that control the lighting. They can and often do make a buzzing noise. I have 20 of the 45W lamps and only a few buzz slightly after warming up. I usually have music on when I use them, so it's not noticable for me. If the buzzing is really loud to you, then you might have received a defective batch, in which case I would contact the manufacturer.
1905557
I have not had any issue with that. I would say if some of the cells are out then you need to replace the bulb. If you notice it is not doing as before take a break from use and then resume.
493542
I was worried about that too, but It does give out plenty of light. It's a beautiful shade. I have a fluorescent energy bulb in it and it does take a couple of minutes, but it puts out just the right amount of light. Not too bright, but not dark either. I get a lot of compliments about it.