250w of MH costs about $16 a month at 12 hrs, cut down to 7.5 like I have mine at and its about 10 a month or .33 a day. I hate when people talk about the electricity costs on MH and they dont know what they are talking about, not you in particular but its a common heard thing over and over again. I have done the cost breakouts in the past, based on my current needs if I was to replace everything with LED compared to MH. If you only get 5-7 years out of the LED, which is what I think is the correct lifespan of LED, not 11 yrs like to claim, the costs are about the same to run LED v MH for 5 years, anything after you will save money with LED. many will I keep my house at 76 anyways, my tank is currently at 79.8 and sometimes gets to 80.5. I dont run a chiller, but I have an open floor plan. Oh wait I forgot to add in my 30w fans which is another 1.60 a month to run both of those. Last months electricty bill in my 2200 sqft house was $185. With all that being said, take two things into consideration based on you, not what everyone tells you is better...
1)What do you want to grow, not necessarily now but in the future.
2)What look are you going for. Do you want shimmer, color pop, strobbing, hopefully noone close to you has epilepsy, a combination of shimmer and pop, etc etc. Your more than welcome to come check out my tank anytime. I run 2x 250w Radium 20k with 2xVHO super actinic for supplements. I am sure that Tmgrash will let you come check out his AI Led System and gabej will let you come check out his custom LEDs. Also I think that Dustinb is running t5s on his system. So within a 15mile radius I am sure you can get a good idea of what different combinations look like.