Radiums

[Znut Reefer]

Hi Dr. Mac I'm using 2 radiums and 2 ushios along with actinics. on Blueline e-ballasts. they are only 1 month old at present. when do you recommend changing them (radiums) for new bulbs?? I've heard in a yr. but I'd like your opinion. thanks!

[Dr. Mac]

You should be able to at least 6 months out of these lamps.

[Znut Reefer]

Thank You Dr. Mac. what about the XM bulbs if I change to them later (5 mos) is the useful life also 6 mos.? Thanks for your time and opinion.

[Dr. Mac]

The XMs seem to have a longer usable life, at least 8-9 months.