Top positive review
The photo editors choice
on 22 February 2016
Lets get the basics out of the way first:
I last bought one of these in August 2011, and it died last week, which makes the 10, 000 hour lifetime appear accurate (10, 000 hours = 416 days, which is about 25% of 5 years, so for it to last 10, 000 hours over that 5 years, it would have had to be on 1/4 of every day, which is very reasonable assumption given that the bulb was in my home office and I practically live in it!).
Brightness and colour
Yes, this does look like sunlight, and yes, it does look a lot more blue than other lights. The light makes reading (and looking at a computer screen) easier on the eye.
The reason I bought this bulb, and the reason I will continue to buy them is their colour temperature and accuracy. The light colour is 6500k at CRI85. In plain English this means ‘the light is 15% short of being identical in colour to the sun on an overcast day, which is the colour of natural light we find comfortable, and which causes us least eyestrain’.
In particular, viewing a properly calibrated monitor (for both colour and brightness) at 6500k often looks too blue under normal consumer lighting, and is also often too bright, causing eyestrain. Under this light though, it looks spot on with no glare. Perfect conditions for the photo editor, or for that matter, anyone who has to stare at a computer screen for hours.
In fact, when my last biobulb went, I just could not bring myself to do any photo editing, as the room just made the monitor colour look way out, and the brightness hurt my eyes after a couple of hours… so delivery of new biobulbs has been one of the most anticipated deliveries from Amazon in a while!
Note: yes I know CRI85 is not that accurate for photography (most photographic lighting is CRI95 or better). This is not for taking photos though; it is for a decent ambient lighting that doesn’t make a properly calibrated screen look odd because the background lighting is too yellow. A 25W or 30W 6500k biobulb solves this issue perfectly.