PHILIPSLED 281790 32W T8 Cool White 4100K Alto Linear Fluorescent Light Bulb (30 Pack), 4'

Very satisfied highly recommend

Dirt used to be the usual reason a fluorescent lamp wouldn't light when it was humid. In F40 needs about 200 volts end-to-end to strike the arc. Damp dirt could cause enough electrical leakage to draw the voltage below 200. I could usually fix a troublesome tube by washing it in the shower.My house uses nine F40T12 tubes. Most had been in use more than 20 years. A tube that's failing usually gives plenty of notice by blackening at one or both ends. It may continue to work for years, but it's fading away. Some of mine had blackening, and one day, one would no longer start. I ordered from Amazon because, not having replaced a tube in years, I forgot I had a spare. I'm glad I forgot!The manufacturer used a simple box with a separator at each end to keep the bulbs from hitting each other. Amazon wrapped the box in the kind of bubble wrap that's a little over 1mm thick. and put that box loose in a larger box. It looked disastrous, but the tubes seemed OK. I didn't know fluorescent tubes were so tough!The old CW (cool white) produced a lot of lumens. It was efficient for reading, but the Color Rendering Index was only 62. Mostly green and yellow, it was gloomy at low levels. Warm white colors were too orange for me. Daylight colors were too blue. I preferred CWX. It was less efficient than CW, but at 78, it had a better CRI than other colors. I found it more cheerful, and blues and reds showed better.When Amazon's description called these bulbs Daylight Deluxe, I remembered the old Daylight, which also had a color temperature of 6500K. The CRI was 58. I thought I wouldn't like the color of these new tubes, but at least they'd light when I flipped the switch. I was so pleasantly surprised that I found the Philips data sheet. The CRI is 90!I replaced the failed tube. Then I replaced a CWX with a darkened end. Being new, the Philips was brighter. I also saw a better color. It was such an improvement that I got a stepladder and replaced all tubes with blackening. I may end up replacing tubes without blackening because I prefer the color.I had occasional failures to start in the bathroom and the kitchen, two rooms where the humidity is sometimes high. The bulbs looked clean, and washing was not a lasting solution. That left one possibility.Glass is hydrophilic. In humid conditions, enough water molecules can stick to make the surface damp. Fluorescent tubes used to have a coating to repel moisture. It seems these tubes have not been treated. Rain-x is a water-repellent coating for windshields. I have some Rain-x somewhere, but the first thing I spotted was an old can of silicone spray intended to make clothing and leather water repellent.I wiped some onto the two bulbs exposed to high humidity. After a year, during a rainy spell when indoor humidity reached 78%, I had trouble again. Dust had stuck to the coating. By now I'd found my Rain-x. I washed off the old coating and applied it. I haven't had any trouble since.

Good value

This is a pack of ten lamps. Of the first four I installed, one refuses to fluoresce (although the filaments in each end light). A fifth lamp works properly. I haven't tried the remaining five lamps. These are priced like first quality lamps. As such I feel that they should be 100% quality control verified to function correctly.These lamps were previously made in the USA. Now, they're made in India.

Excellent

Great packaging and works well.

Selecting LED replacements was challenging.Re-configuring the lighting fixture was also challenging.The online installation documentation for these lamps did not match the documentation providing with the lamps.This lead to significant time consumed to determine exactly what was required for proper configuration and installation.Key facts, IMO: ************************************************** Important ****************************- Must bypass the ballast.- The lamps are 'single-end powered'.- Tombstones must be non-shunted.Thus, in my case, I had to:- Disassemble the tombstones, so as to 'cut the shunt' between the two internal contacts. I then re-assembled the tombstones. If I had not 'cut the shunt', I would (apparently) have a direct short across the pins of the lamp. Pyrotechnics would have been likely, I assume, had I not modified the tombstones.- Rewire the tombstones. Since these lamps are 'single-end powered', and the original fluorescent lamps were powered at both ends, it was necessary to rewire the tombstones such that power would only flow to one end (one tombstone) of each lamp. 'Line' power to one pin/contact. 'Neutral' power to the other pin/contact.Pros:- Bright white (6500K) light.- Reduced waste heat.- Packaging was sturdy, and well designed.Cons:- Documentation was inconsistent, and unclear, relative to my existing wiring, and shunted-style tombstones.- Had to carefully modify the tombstones (I could not find proper fitting non-shunted replacement tombstones for sale.)- Installation, for me, was very time-consuming due to the documentation issues, and the tedium of disassembling, modifying, and re-assembling the tombstones.- One bulb (out of 8) was intermittent for the first hour of service. Has been fine since.I would buy again, now that I understand the whole process of making them work.

I dreaded buying tube lights, so many lengths and sizes and mix in if it needs a ballast or not type of tubes. But works great, brighter than the ones I replaced

Great product: very bright, super white light, Unfortunately, is packaged to be opened like a suitcase, with the bulbs lying flat in 2 rows of 5... making it precarious to store vertically once opened if you only need a few at a time.

The lights are very bright and make the kitchen cheery.

Ils sont de qualité supérieur , le prix est meilleur qu 'en magasin

Arrived broken by delivery. Driver advised not to accept broken glass .Hope I wasn't charged!

These bulbs are like the originals -- they work as an OEM -- and fully meet expectations -- with the backing of Phillips