Sylvania 24683 - F40DSGN50-40 Watt T12 5000K Full Spectrum Fluorescent Light Bulb, 4 Foot Length, (Pack Of 4)

I just set up some shelving for some indoor tropical plants. The room is a bedroom with some good light for a few hours in the afternoon. I needed some constant bright light. I bought two of these bulbs and the work beautifully as a continual light source I addition to the natural sun I have. I wouldn't recommend them as a light source by itself in dark rooms, but if they are adding light, they are fine. The light is a neutral color, nog too blue of yellow. She shipping was fast and the bulbs can in one piece.

The bulbs arrived early and undamaged. I am an amateur photographer and I was looking for a crisp natural light to really see my prints in the clearest possible way and I believe this does the job perfectly. I know they say that with a 6500K the lighting is closer to natural sunlight but when I used other bulbs I could see a blue or pink tint in the light. I use 4 bulbs and the 2200 lumens output is plenty of light for a 10’ X 13’ room and with the 20000 hours of life they will be around for a while. I would and do recommend these bulbs to others.

Arrived quickly and just installed. The bulbs came in cardboard sheaths surrounded in bubble wrap. The prongs were encased in protective plastic. All perfect. Just pull out the sheaths and gently remove plastic off the prongs. They fit my 4’ older fixtures perfectly. Had to fiddle and turn a bit to connect correctly, but voila! Light! I previously had 5000K daylight bulbs, but these seem somewhat cooler and brighter. Perhaps mine were aging. I don’t know what the CRI was in my older ones, but happy these are a 90. I am a painter and was having trouble with the lighting in my studio. Anything between 5000K-6000K (color temperature) and 80-100 CRI (color rendering index) is recommended for good studio light. This was much cheaper than ordering fancy studio lighting where you need to change ballasts for T8 lights. And those were $130-40 for 4 lights! Very happy so far.

I bought 2 of these lights to go with the greenhouse light fixture I bought at the same time. These are supposed to be 5000K full spectrum lights. What a waste of money, you can hardly tell that they are on. I will go to the hardware store and buy replacement lights and throw these away. Do not buy this product, nor anything from this vendor. Amazon lists these lights as 'frequently bought with' the 'Hydrofarm FLV42 Fluorescent Grow Light Fixture' but they are clearly inadequate for growing anything, except maybe moss. I am very disappointed in both the product and in Amazon for not pairing the grow light fixture with an appropriate bulb. I have 15 watt fixtures that give off more light.

Works well shipping was hard on them need more protection on the ends

Not really sure how to rate this product... due to my lack of knowledge when I ordered so many of them. They don't work in some residential {40 Watt Full Spectrum Fluorescent Lamp, 4 Foot, T-12, Medium Bi-Pin}bases... or Bulb holders. I finally got two of them to work in my basement... my arms almost went numb trying to figure this out... have to get those pins exact or they flicker... might be good in one of the those Disco rooms... but bad on the eyes. Smile But, when trying to get it right in the upstairs kitchen? NOPE. Well, I have plenty of bulbs for my basement... will last until doomsday. So I bought the right kind for my kitchen and they work. Hootie... I on to doing more around the house. don't give up the first try gals... just keep on plugging in. H@H! {oh, they did come intact... no broken bulbs... thanks guys.

What was once common item ( fluorescent tubes..) are not all that common to find in stores. In urban areas , a hardware store can be hard to get to. Some sellers want you to buy a case, NOT HERE! At one point my apt. building sold them, not any more ( though they did "advise" me that they would get me 2 at $29 EACH..ahem... thank you, but NO!). This seller ships PERFECTLY, and the lights are BRIGHTER then the old ones that I replaced. Bottom line: Do NOT rent a car or take a cab to go get lights, make life EASY and have them shipped, from this sensational vendor -no stress, such ease. At LAST, the kitchen is lit up again! Go for it! In the long run, you will save money, time, and most importantly, STRESS! You will be HAPPY with this choice, and don't get hung up on the price you probably paid 20 years ago, when you last replaced the tubes! You will be amazed by the brighter than bright look!

This was sold as a "1 pack." Most fluorescent bulbs are changed in pairs and sold in pairs, so I (wrongly) assumed that a 1 pack was 2 bulbs. It is not (from this company), as some other reviewers have mentioned. I did not think I needed to read a review for a light bulb, but obviously I did. For the same price, Home Depot sells an actual pair. Since shipping was free, this seemed to be more convenient, but obviously not - I have to go to Home Depot and get the pair, since a single bulb doesn't help.