Top critical review
2 people found this helpful
Very good, but not perfect - slow to get bright
on March 11, 2013
Now that I have used these bulbs for over a month, I finally used a stopwatch to find out how long it takes for them to get bright.
These are in a bathroom and you get enough dim light to see when you flip the switch ( dim = maybe 15%-20% of full power)
To get to the 50% level takes a full 50-60 seconds
To get "bright" (80%+ takes a full 2 minutes.
Full brightness (when you can no longer tell there is a CFL coil in the globe) takes a little less than 3 minutes.
If the bulbs are off for just a few minutes (2-3) they come back on at near full brightness right away
I would still buy these, despite the slow warmup, but would downgrade my rating to 3 stars because 3 minutes is a long time to wait for full brightness.
If I could find them at a reasonable price, I would replace 2 of the 12 bulbs with LED's to get more light in the room during the warm up period.
My initial review:
I have a master bath with 12 bulbs - a real energy hog with 12 - 40 watt bulbs, and these lights are on about three hours per day, which in California translates into 45 cents per day/ $14.00 per month/$165/year, so these 12 bulbs should save me $122 per year., I replaced all 12 clear bulbs with these white CFL's and these are much brighter than the old ones.
These lights are a bit dim for the first 15-20 seconds if you start them cold, and even though they are sufficiently bright after 15 seconds,, it is about 45 seconds before they really reach their peak.,but I can live with that small inconvenience for the sake of the money I save.
I am going to put these in two other bathrooms - one has six bulbs, the other has 4. In those rooms, I am going to use one conventional bulb and the rest CFL's. That way I get a bit more initial light, and still get significant cost savings