MH bulb comparison pics

[Old Guy]

I do mean they do look like somebody else's 20000k (Thanks Jack). I would like to know how Manufactures rate their numbers. If AB's are supposedly 13000k(sold as 10k), Ushio 10000k, Sunburst 12000k etc., etc., which are all whiter type bulbs, how is a Sun Aquatics 14000k more like a rated 20000k. I don't mind the total blue look but I don't personally think there is enough par in the bulb and I would have to change out my VHO actinic's to 10000k to supplement. Again this is JMO.




Jeff