Thanks to a forum member here I’m going to spend some off the wifes hard earned money on this light meter. Simple, just go and but it. No its not simple when it should be. There appears to be three different light sensors, orange, white and black. Please make this simple. Which one do I buy to make the Mrs get angry with me. Thanks.
looks like the orange and black ones are actually covers for the light sensor. i know the black one is just a cover anyway, and the orange one looks like it has a notch for popping off and a chain attached
Those colourful stuff are the caps (like my 1st brother said above ). 
Much cheaper one here with similar peak function:
http://www.fasttech.com/products/0/10003840/1274500-hs1010-illuminance-brightness-light-meter
I don’t think there’s an established accuracy report regarding lux meter brands, so I guess they are pretty much ok.
Thanks guys. The reason if there is one to puchase this one is that a few other members have them as well. Its the wifes money or my credit card. I dont get any money so just write what I spend on the board very quickly and then run like blazes before whatever she throws, if l’m lucky miss’s me.