Feit Electric ESL40TN/D 42-Watt Compact Fluorescent High-Wattage Bulb, Daylight Review

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(More customer reviews)The 40W fluorescents (150-200W equivalent) are hard to find in most brick and mortar stores (they like to sell the smaller 40W and the 100W equivalents) so I was double-happy when I saw this one at Amazon. First, because Amazon carries it and second because it's available under super-savers' shipping.
Talking about the item itself:
- you WILL experience some delay when you turn it on but it's hardly noticeable, like maybe 1/10 of a second
- once it's on, unlike the 'cheaper' fluorescents that need to warm up, it shines at or close to full brightness immediately
- it's a bulky, significantly wider and longer than the 150W incandescent equivalents and it may not fit all fixtures where a regular 150W bulb used to fit
- does not work well with a dimmer - it's either on or off [I tried it with one and it did come on at full brightness but something is telling me that you may shorten its life when used this way]
- the light is bright, so bright, I would not stare at it directly - I did once and I saw 'ghosts' for the next 15-30 minutes
- the color of light is closer to 'solar' than what our 'incandescents' deliver, less yellow, more blue
- unlike neon lights, there's no flicker
- it consumes less power when compared to an incandescent
The above were my subjective comments. Here are the specs, as the manufacturer lists them:
- Light output: 2800 lumens
- Energy used: 42W
- Life: 8000 hrs.
- Color temperature: 6500K
- Electric charge: 610mAThe major issue I have with the fluorescents is their lifespan. Maybe I am unlucky but, after replacing nearly all my light bulbs in the house - a few dozen - they seem to burn out more often. My first couple 40W I bought a few years ago (a different brand), in fact, died after about one year, I hope this is not the case again because we are paying top dollar for these environmentally nice devices.
So far, I see no reason not to award this bulb 5 stars but, if it dies on me before 2-3 years, I promise to come back and update my review. For the record, the maker promises a 7-year lifespan and $152 (???) savings per bulb.
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January, 2011 update:
On their 20th month, they (I bought a 2-pack) are as bright and shiny as on 'day one' and they've been on for many hours because I telecommute most of the time and my office is in the basement. I haven't done the math but it's likely that they've paid for themselves already.
I bought 2 more in December, 2009 and no burnouts yet.

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40W twists compact fluorescent lamp medium screw base

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27 Watts 5500K Color corrected Day Light Fluorescent Lamp Photo Bulb - 2 Pack Review

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(More customer reviews)these are off the shelf $2.00 cfls the seller claims 5500 kelvin. These are more like 3500 kelvin. not as pictured or described light spectrum may not matter in a porch light but this seller claims to be selling a photo flood with a daylight spectrum and is not delivering this. the manufacturers website says nothing about spectrum. Ummm maybe you ran out of the good ones and called me a sucker.

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This is a fluorescent 27 watts energy saving daylight photo bulb (5500 Kelvin temp.). This Fluorescent lamp bulb emulates a soft daylight measured at full spectrum color of 90 CRI at 1800 lumens. Lifespan: 10,000 hours. Ideal for all Tungsten Continuous Lighting Kit. This photo bulb would cost you $21 each at your local retail store. Best price combo on the internet. **Limited Time Promo**

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Full Spectrum Light Bulb - ALZO 27W Compact Fluorescent - Case of 4 - Daylight Balanced 5500K - Pure White Light Review

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(More customer reviews)I am an engineer who has been completely disgusted with the home lighting situation. There are no standards and many misstatements and counterdictions at the stores. I own a Minolta flash meter which accurately measures a lights color temperature. I've tried the bulb technology at Walmart, Sams Club Home Depot and Lowes. The most glaring examples:
1) yellow light is called soft white (2700)
2) very blue washed-out color light is called daylight (6000-6500)
3) Low lumen (400-600 lumens) LED lights go for as much as $90!
4) Some bulbs are advertised as white but the chart on the back shows its yellow. Go Figure!
Here are the bulbs to avoid: all (harsh washed-out blue) daylight, and (yellow) soft white. The GE Reveal offers somewhat better clarity, but is overpriced and quite yellow.
Full spectrum (5000-5500) bulbs are a step-up but stores offer a very limited selection. The Home Depot full 100w spectrum's beats the Lowe's Ott-Lite.
On the LED front Sam's Club carries a 520 lumen, 4100K, 9 LED PAR38 reflector which has a easily noticeable smoother light spectrum. Great for the one light on in the kitchen in the evening. The equivalent $70 LED lights at the hardware store are hardly a bargain, as the Sam's is $20! However its Color Retention index (CRI)is only 74.
The best of all are lights are these 5500K Alzo's. I've installed a 45w in the kitchen pantry and the color of the food boxes really pop. Food looks like it does in the magazines. The clarity is first rate (however 27w should be sufficient). They are the reference to which others are to be compared. My wife has not complained even when they are on at night-time. This is a first.
Skin tones in the bathroom look very natural. A first again.
Color temperature alone is not the sole basis to buy a bulb as a high CRI is also required. The Alzo's come in at 92, which is very high. Most manufactures do not even list this measurable figure (assume because its too low).
I've been testing other bulbs. For vanity and lamps (Alzo does make any) these offer a VERY uniform ball of nice white 5000K glow. I ordered 12 for my new house's bathrooms:
Maxlite 14 Watt G30 Globe CFL DL SKM14EGDL
For kitchen these are now the best 5000K PAR lights. Not as high of color quality as Alzo, but they don't make reflector lights!
Maxlite 23 Watt CFL R40 Flood Day Lite SKR423FLDL
In summary best home lights are the Photo CFL which offer both a 5000-5500K range with a CRI over 90. Further these bulbs allow for brighter rooms, as compared to hardware store types. That is, the more pleasing light allows for greater brightness levels, so go for the 45watt bulbs in larger pantries or rooms.
Thanks go to Amazon and Alzo for allowing consumers to purchase superior quality products at a price no higher than the unpleasant and unsatisfying bulbs in the store. Hope this helps!

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Case of 4 full spectrum light bulbs that imitate daylight, are energy star compliant, and have a long life at circa 10,000 hours with 1300 Lumens output; low energy consumption, good for treating Seasonal Affective Disorder S.A.D., for photo studio lights, or for starting plant growth. These are Compact Fluorescent Light (CFL) bulbs. Fits all medium-base E27/E26 sockets, but this is a large bulb that might create a fit problem with standard lamp harps of household light fixtures; a larger lamp harp is needed, see ALZO 9" harp, ASIN B0035LTIZE. Dimensions: L: 6.5"; W (Diameter): 2 1/4"; Length socket base to top of ballast: 2 3/4"; W (diameter) of socket: 1".

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27 Watt - 4 Pin - Full Spectrum CFL Replacement Bulb - Verilux CFML27VLX Review

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(More customer reviews)I have one from an original Verilux's fixture and the included bulb burned out in less than 2 months. Then I replaced it with another brand's bulb.
In terms of form factor, as long as it has a GX10Q-4 base (sometimes called "linear quad" or "4 pin F quads"), any replacement bulb should fit *EDIT* but please see the discussion in the product "comments" below for a brand that works and another that doesn't. I do not know why there can be so much variation in a socket specification...
In terms of light quality, as long as it's 6000K, you may not see a difference unless you do a side-by-side experiment. Sure, Verilux will claim that they are "full-spectrum", but you can read the spectroradiometer output yourself if you search for "solux verilux". I won't go so far to claim that all 6000K Compact Fluorescent Light bulbs on the market are the same. They may vary in the chemical composition and hence the color temperature. (Verilux measures 5700K in my experiment and a competitor's at 5900K. Note that most people prefer warmer temperature so indeed 5700K is more preferrable.)
Having used a different brand's replacement myself, there is very little difference in Verilux's bulb to justify the much higher price (more than double if you shop around) when compared to competitors. Your choice.

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This Verilux CFML27VLX Natural Spectrum Bulb features 10,000 hour, 27 watts. It is for use with the following Verilux Lamps: Heritage Deluxe Floor Lamp, Original Deluxe Floor, Desk and Clamp Lamps, Portable Lamp, EasyFlex® Floor Lamp, Modern, Princeton, Princeton Executive and Shelburne Desk Lamps, Princeton and Shelburne Floor Lamp, HappyEyes® and HappyEyes® Deluxe Floor, Desk and Clamp Lamps, Oreck 3-in-1

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GE 13-Watt Energy SmartTM - 8 Pack - 60 watt replacement Review

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(More customer reviews)At a little over 10 bucks for 8 of these, you can't go wrong.
These are just your basic CFLs, at the 2700 kelvin temperature range. That means they're about the same shade as your basic ordinary 60W incandescent bulb. A pale yellow white, not pure white (5100 Kelvin), or daylight (around 6300 Kelvin).
Pure white or daylight CFLS cost more because the phosphors in them are more expensive, but they do have the advantage of being more natural light, rather than imitating the poor quality light of an ordinary light bulb.
So if you're thinking of upgrading to CFLs these bulbs are a great deal to start from. But do take advantage of the technology & get a higher quality light at a higher color temperature for some of your areas, & enjoy better quality light, rather than just using CFLs that imitate the poor quality light of old fashioned light bulbs.
Winter depression can be triggered by lack of natural light because of less hours of daylight, & more cloudy, overcast days in winters. In northern climates when it's cold, people stay inside more, use heavy insulating window curtains, further reducing their exposure to natural light. 5100K-6700k CFLs help with winter depression by exposing you to more natural light. Colors look more rich & vivid. Things look more cheery. It's even easier to read under natural light.
I find I can read just as easy under a 4-watt 5100k CFL than a 13 watt 2700k CFL.
The backlight in your LCD display that you're probably reading this from is probably a 5100k-6700K bulb.
Look at the white areas on the screen & then look at your lighting in the room. Doesn't that ordinary light bulb or 2700K CFL look a lot more yellow by comparison?

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