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

For those who get moody in the winter months, the full spectrum bulbs are a mood enhancer. Hubby comes in from his shop in a much better mood.

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.

Packaging was a joke! Bulbs were held together with a rubber band on each end and all 4 together were wrapped (nothing in between the bulbs) around all 4 with a small layer of bubble wrap... one bulbs had a "rattling" noise... one bulb the prongs were bent and not straight (looks made that way) got all 4 hooked in and they don't work

After much research these were just what I needed to start my heirloom tomatoes , peppers and eggplant from seed. I used jiffy peet moss pods , heating pads, fox farm grow big liquid fertilizer and these lights , I started them approximately 2 months ago. They are huge. We have two ballasts with 4 lights, I ordered 4 more to accommodate the rapid growth of the plants . I still have another month before transplant. These are great and a decent price.

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.

Using for a grow light to start my tomato plants. Looks good. Easy purchase.

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!

I had bad luck with these- most didn't work