As I stated in the other thread, for reputable, properly adjusted for chameleons, and long lived bulbs with consistent performance, have a conservation with the experienced guys at reptileuv.com and lightyourreptiles.com. Many MV are too intense and most aren't suitable for use with a chameleon in your set-up. Will your chameleon die if you don't follow my advice and provide additional basking choices and don't rely on just the MV bulb, maybe not, but it doesn't bode well for long term success, if you are unwilling to follow up with the advice and information given and not ensure that you have an appropriate, not just convenient lighting set-up.
If you want to use MV you really need to follow up with those 2 suppliers. They have experience with using their products with chameleons and their products are held to higher standards for safety and longevity than more mass produced products. These people will take into account your set-up, temperature needs, and the species you are keeping and help you choose and appropriate wattage, recommend a proper fixture, time schedule, distance from the basking branch, and additional bulbs to pair the bulb with for additional lighting and basking, as is needed for plant healthy and the psychological well being of the animals.