It's spectrum is like having sunlight in your grow room. It's great for taking pics because it's just like daylight. It radiates the same amount of heat as the equivalent wattage HPS bulb, but it doesn't "throw" the heat downwards towards the plants as much as HPS.

I have a 400 Watt CMH, the reason I went with one was because 1) I have an old 400 Watt HPS Ballast that can fire these bulbs, and 2) it throws WAY less HEAT than a 400 Watt HPS, and it's open fixture rated so that made my life even easier. It also maintains it's lumens better, longer life, ect..

The reason they say they're as good as sunlight is because the US Navy has been using some (SOME!) on subs to see how the crews react. Like plants we too need sunlight to live.

Hej derude !
Hvilket lys bruger I selv til jeres planter? Og hvad er det bedste ?

Jeg har nemlig fornyligt købt disse pærer:
Link slettet igen.
Det er LED så de koster næsten ingenting i strøm, de er ca. 10 cm i diameter og har hele 80 LED lys i én pærre fordelt imellem blåt og rødt lys. og så har de en levetid på 50.000 timer!
Jeg er SÅ glad for dem! Mine planter skyder i vejret, og man kan se at de er "glade" :b

Dette er det aller billigste jeg har fundet dem til! Og de giver rigtig meget lys:)

Men ville gerne høre jeg derude, hvad I selv synes er bedst at bruge?
Tak for det!