Energy Miser FE-IISB-23W-65K - 23 Watt CFL Light Bulb - Compact Fluorescent - T2-100 W Equal - 6500K Full Spectrum Daylight - 80 CRI - 70 Lumens per Watt

These bulbs are rebadged in the product description. The bulb actually received is as follows (copying from the package & bulb):"""Longstar Compact Fluorescent LampSuper Day LightFull SpectrumBrightness: 1600 lumensEstimated Energy Cost: $2.77Energy Used: 23 WattsAverage Life: 10000 HoursEstimated Yearly Energy Cost, Based on 3 hrs/day, 11 cents/kWh, Cost depends on rates and useLife: 9 years, Based on 3 hrs/dayLight Appearance: 6500KEnergy Used: 23 wattsContains Mercury: For more on clean up and safe disposal, visit epa.gov/cflFE-IISB-23W23WE266500K120V60Hz420mA8-36701-00135-6Made in ChinaCAUTION:- Risk of electric shock - use only in dry locations.- Not for use where exposed to the weather.- Not for use in totally enclosed fixtures.- Not for use with timers, photocells, dimmers, and motion control devices.- This device is not intended for use with emergency exit fixtures or emergency exit lights.- This device may cause interference with radios, televisions, telephones or remote controls. If interference occurs, move this device away from or plug into another outlet.- Optimum operating temperature 5F (-15C) to 122F(50C).- Light output has more than 5% decrease when used in base down position than in base up position."""I like the bulbs. They are indeed closer to "daylight" than the EcoSmart 4000K bulbs I had been using from Home Depot, but I don't have the equipment to actually verify the color temperature or brightness. The bulbs go to half brightness and then what appears to be full brightness in less than a second, so it should be fast enough for you unless you need a truly instant-on bulb. Keep in mind that all CFLs can take 10-15 minutes to fully warm up and get to the rated brightness. But like I said, the bulbs subjectively appear to be fully bright within 1 second, any increases after that are small and beyond my ability to notice.

This bulb produces a light that is very white (high color temperature). You may or may not like this. I certainly do as it seems closer to natural daylight. I prefer it to the somewhat yellow color of incandescent light bulbs and most CFL bulbs.We have two lamps on the outside of are garage that light the driveway and front of the house. We're using these bulbs in each of the lamps. The extra whiteness seems to make everything much more visable. The lamps are run all evening and being outdoors are subject to temperatures that can get a little below freezing. So far, they've worked fine.We've only been using the bulbs a couple of months so I can't comment on their reliability. As the saying goes, so far so good.

I have a sump for my reef tank where I have Mangrove and Cheato plant to reduce nitrate for the tank. I have used 2700k CFL 23w to save electricity cost from the power compact 55w, and the plants died off.Finding this light bulb of 6500k, the right frequency for my plants, I am excited. It arrived within a few days and it was very bright compared to my old 55w power compact bulb.All 5 bulbs turned on fine. I am excited to see how long it last (warranty for more than a year)I will post update.

these are not strong enough with just one,so I recommend at least three for a mid size plant.but are at a great price compared to others.put off some heat but are safe ,just make sure they have a little room to avoid fire.happy with overall

Man, I gotta say this bulb really makes a dark area less dark, hell it even makes it bright. I gave this to my wife as an anniversary gift and she still uses it in the lamp I gave her on our wedding day. Next anniversary Ima get this lady some electricity.

Bulb worked fine. Put on timer for 6 hours a day and the bulb literally burned out 5 days past the return window. Avoid the bulb. Not worth it.

Have a room with all fluorescent tube bulbs. The plug was acting up so started using the overhead socket instead. Tried to use a regular bulb in there and the difference in the color of light was driving me crazy. This bulb produces very white light like the others so has worked out perfectly.

Bought in March 2016 and it burnt out in July 2016. Was great while it lasted though. It kept my house plant alive and happy. Gonna try a different bulb next time but might try this one again.