best bulb for a 400w M59 ballast?

[WAGERJA]

Has anyone used these bulbs on a 400w M59 MH (regular magnetic, NOT HQI) ballast?

XM 400W 20000K SE 1________PPFD__128
Coralvue 400W 20000K SE 1____~____110
Ushio Blue 400W 20000K SE 1___~____109
XM 400W 15000K SE 1_________~____104
Hamilton 400W 14000K SE 1____~______96

Iââ"šÂ¬Ã¢"žÂ¢m looking for a bulb to go with my new setupââ"šÂ¬Ã‚¦

Iââ"šÂ¬Ã¢"žÂ¢d like to know how ââ"šÂ¬Ã…"œblueââ"šÂ¬Ã‚ each is in your opinion, I donââ"šÂ¬Ã¢"žÂ¢t like that dim look some 20Ks have.

What is the bulb life is before there is a major spectral shift or drop in PAR?

I was looking for 14/15K bulbs but some of the 20ks seem to have better PAR on this ballast.

Iââ"šÂ¬Ã¢"žÂ¢m looking for the most PAR (in the 14/20K range) with a bulb that I donââ"šÂ¬Ã¢"žÂ¢t have to change every 6 months on this ballast. (have it already but havenââ"šÂ¬Ã¢"žÂ¢t used it).

Any help would be great, Thanks

-J

 

[elephen]

You might look into the Radiums, the PAR isn't as much as the others but the coloration on a M59 ballast is about 14k coloration.

 

[WAGERJA]

any idea on the bulb life? I seem to remember 250w Radium 20Ks going south in like 6 months....

these are going in Luminarc reflectors and blended with my 2X BLV 250w DE 10Ks on a 200g(2'x2'x7') SPS tank.

like this, left to right:
6500k 55wPC/400SE/250DE/actinic 2X55wPC/250DE/400SE/6500k 55wPC

-J

 

[WAGERJA]

just one bump then I'll let the thread die in peace. LOL