GCP 167 - 85 Watt CFL Light Bulb - Compact Fluorescent - - 350 W Equal - 5000K Full Spectrum - 80 CRI - 68 Lumens per Watt - 15 Month Warranty

I am using these as security lights in outdoor lamps. I bought and installed eight and after 3 years, four have burned out. Otherwise, they are very bright and work as expected.

So far, so good. I purchased the CFL rated at 400w incandescent (per box; description on Amazon now reads 350W) with 85w consumption. The seller is "1000bulbs", I think is important to mention. Some sellers have knockoffs (I've already encountered such problems on other items). Today is the 1st day I'm using it, & the reason for my purchase is to use less light fixtures for the indoor garden I have. Up until now, I've been using CFL bulbs rated @100w incandescent rating, which I believe put out about 20w actual. I've been using up to 6 or 8 at time, so if I can use less fixtures with higher output bulbs, I'll be happy. I was really hoping to get LED E26 or E27 based bulbs to use, but none had an acceptable lumen output at the kelvin output I wanted. This way the wattage use will go down drastically & safe on running costs. I know the LED technology is still new so on the meantime I'll use these CFLs. This one bulb should take the place of 3 to 4 of the 100w CFLs I've been using. I will update with progreds in about a month or two. The plant growth & health will be the deciding factor.***UPDATE*** 3-8-17I've already seen an improvement on the plant growth. Leaves are bigger than previous years with (6x)100W output CFLs. I don't use any lights specifically made for growing, either previously or now, so the only differences are the output wattage. My plants are about 1 to 1.5 feet away from the bulbs. Yes, the bulbs produce some heat, but in my home I don't use heating (for home warmth), so typically in the winter before lights this rooms can be as low as mid 30°s F with the previous (6x) 100W output setup. Now it's a bit difficult to compare accurately, due to this year's winter being warmer than normal. Overall, the temps go no lower than 40°s F. I now use (3x) 400W output CFLs in conjunction with (3x) 100W output CFLs to cover the whole surface area I have with seedlings and growing plants from the previous year. I intend on buying maybe 3 more to satisfy my indoor growing room size, but may not need them until next seedling starting season.

Bought these in December 2018 and they are still working great.